Molecular evolution, four class of chromosomal mutation, Negative Selection and Positive Selection, Mutations in DNA and protein, Neutral Theory of Molecular Evolution, Evidence supporting neutral evolution, Phylogenetic trees, Methods of Tree reconstruction
A brief description on Molecular Evolution, Kimura's theory of Molecular evolution, Neutral theory vs. Natural Selection, Neutral theory: The Null Hypothesis of Molecular Evolution
Molecular evolution, four class of chromosomal mutation, Negative Selection and Positive Selection, Mutations in DNA and protein, Neutral Theory of Molecular Evolution, Evidence supporting neutral evolution, Phylogenetic trees, Methods of Tree reconstruction
A brief description on Molecular Evolution, Kimura's theory of Molecular evolution, Neutral theory vs. Natural Selection, Neutral theory: The Null Hypothesis of Molecular Evolution
Trends in evolution :- synopsis :- 1. INTRODUCTION
( DEFINITION OF EVOLUTION)
2.TRENDS IN EVOLUTION
3. DEFINITION OF MOLECULAR EVOLUTION
4.GENE EVOLUTION
*Mutation
*Horizontal gene transfer
*Sexual reproduction
5.EVOLUTION OF GENE FAMILIES
(Kind of gene families)
For more you can refer to www.faunafondness.com
Trends in evolution :- synopsis :- 1. INTRODUCTION
( DEFINITION OF EVOLUTION)
2.TRENDS IN EVOLUTION
3. DEFINITION OF MOLECULAR EVOLUTION
4.GENE EVOLUTION
*Mutation
*Horizontal gene transfer
*Sexual reproduction
5.EVOLUTION OF GENE FAMILIES
(Kind of gene families)
For more you can refer to www.faunafondness.com
Example OneDiscuss how new discoveries in genetics are contr.docxSANSKAR20
Example One
Discuss how new discoveries in genetics are contributing to our understanding of the HIV virus
and how some folks exposed to HIV have been able to escape developing AIDS.
The HIV virus daily infects 14,000 people, however some individuals’ odds of contracting the
virus are very low. Dr. Donald Mosier of the Script Institute was puzzled by this and launched a
genetic study to determine why certain individuals are resistant to the HIV virus. What Dr.
Mosier discovered was the resistant people inherited a deletion mutation that gave them
protection. Within the deletion mutation, the receptor CCR5, is excluded. This deleted section
of the CCR5 receptor functions as a lock, therefore people born with the mutation will not get
the HIV virus. Those individuals that are homozygous – have two copies of the same deletion
gene, are immune to the virus and are protected. Individuals that are heterozygous – have two
different genes – have some protection from HIV because their body have half the “locks.” Dr.
Mosier further studied populations and discovered the deleted mutation was higher in certain
parts of the world and among Caucasians.
Explain the genetic connection between phenotype and genotype discovered by Mendel in the
19th century.
Genetics helps to understand human diversity, not only in today’s world but in the past as well.
When studying genetics it is important to understand the relationship between phenotype and
genotype. A phenotype is defined as an observable physical characteristic whereas a genotype
is the set of specific genes an organism carries (Allen, Anton, Stanford 60). In the video lesson,
Anne Stone commented the phenotype can be impacted by the environment. For example, if
there is not sufficient food or there is disease, this can impact an individual’s height which is a
phenotype. Anthropologist Geneticist Joanna Mountain explained a phenotype can be
“measurements and anything we can describe about a person from appearance to metabolism.”
Utilizing the garden pea plant to conduct his experiment, Gregor Mendel was able to recognize
traits were passed on from parents to offspring. He knew traits were inherited but did not know
how this inheritance worked. Mendel’s Principles of Segregation which states in an organism,
alleles occurs in pairs and when gametes sex cells get produced, alleles separate so each
gamete contains one member of each pair. Further experiments by Mendel lead him to
conclude in a unit of inheritance, meaning offspring received receive genes from each parent.
Theses principles laid the foundation for future scientists to study inheritance.
Vocabulary
Phenotype – observable characteristics; expression of genetic instructions; something you can
measure
Genotype – genetic make-up of an individual; every person has a unique genotype made of
genes inherited from parents
Recessive – a masked trait or covered up
Dominant – mask recessive characteristics
P ...
Menders experiments were conducted using garden peas. Why would human.pdfisenbergwarne4100
Menders experiments were conducted using garden peas. Why would humans be an awful
choice for an experimental organism (give at least 3 reasons)? Give an example of an animal that
would be better sorted for genetics experiments. In Mendel\'s experiments, a plant with purple
flowers was crossed with a plant having white flowers. Explain why white flowers disappeared
in the F_1 generation and reappeared in the F_2. Your pet rabbit has curly fur. After seeking
advice from a rabbit breeder, you learn that curly fur is a dominant trait, but you want to know
the precise genotype of your pet. Describe how you could find out. Describe the inheritance of
ABO blood types in humans and explain why individuals with type O are universal donors while
individuals with type AB are universal acceptors. Describe the nature vs. nurture debate. In your
explanation, give an example of a trait that is controlled entirely by nature and one that is heavily
influenced by both nature and nurture.
Solution
Answer:
1. Studying human genetics is unlike studying the genetics of any other organism. In many ways,
humans are very poor model organisms for genetics. Long generation times make for slow
progress when doing genetic crosses, which brings us to another problem with human genetics:
The inability to make controlled crosses.
So, any human geneticist that tried to make controlled human crosses would most likely be
considered a very disturbed criminal and not a brilliant scientist. Besides, humans usually only
have one child at a time, which makes it really difficult to generate numbers of offspring that can
achieve statistical significance. On top of all this, there\'s the issue of genetic manipulation. Key
genetic techniques, like mutation screening and transgenics, are completely off-limits to human
geneticists.
Drosophila melanogaster (Fruit fly) would be better suited as a model organism for genetics
experiments.
1. The relationship between fruit fly and human genes is so close that often the sequences of
newly discovered human genes, including disease genes, can be matched with equivalent genes
in the fly.
2. 75 per cent of the genes that cause disease in humans are also found in the fruit fly.
3. Drosophila have a short, simple reproduction cycle. It is normally about 8-14 days, depending
on the environmental temperature. This means that several generations can be observed in a
matter of months.
4. Fruit fly are small (3 mm long) but not so small that they can’t be seen without a microscope.
This allows scientists to keep millions of them in the laboratory at a time.
5. They are inexpensive to maintain in the laboratory.
6. They require a simple diet consisting of simple sources of carbohydrates (cornmeal) and
proteins (yeast extract).
7. The only care they need is having their food changed regularly (every 10-14 days at 25C or 5-
6 weeks at 18C).
8. Drosophila have ‘polytene’ chromosomes, which means that they are oversized and have
barcode-like banding patterns.
Heredity and evolution class 10th Questionssinghaniya12
Ncert chapter heredity and evolution class X you can find questions for exam preparation and there is lot of questions based on heredity and evolution chapter for it is doc file it contain short or long answer type question and it is like question paper of school
GENETICS - Dr. P. Saranraj, Assistant Professor, Department of Microbiology, Sacred Heart College (Autonomous), Tirupattur, Vellore District, Tamil Nadu, India
Chapter 3BiopsychologyFigure 3.1 Different brain imagi.docxwalterl4
Chapter 3
Biopsychology
Figure 3.1 Different brain imaging techniques provide scientists with insight into different aspects of how the human
brain functions. Left to right, PET scan (positron emission tomography), CT scan (computed tomography), and fMRI
(functional magnetic resonance imaging) are three types of scans. (credit “left”: modification of work by Health and
Human Services Department, National Institutes of Health; credit “center": modification of work by
"Aceofhearts1968"/Wikimedia Commons; credit “right”: modification of work by Kim J, Matthews NL, Park S.)
Chapter Outline
3.1 Human Genetics
3.2 Cells of the Nervous System
3.3 Parts of the Nervous System
3.4 The Brain and Spinal Cord
3.5 The Endocrine System
Introduction
Have you ever taken a device apart to find out how it works? Many of us have done so, whether to attempt
a repair or simply to satisfy our curiosity. A device’s internal workings are often distinct from its user
interface on the outside. For example, we don’t think about microchips and circuits when we turn up
the volume on a mobile phone; instead, we think about getting the volume just right. Similarly, the inner
workings of the human body are often distinct from the external expression of those workings. It is the
job of psychologists to find the connection between these—for example, to figure out how the firings of
millions of neurons become a thought.
This chapter strives to explain the biological mechanisms that underlie behavior. These physiological and
anatomical foundations are the basis for many areas of psychology. In this chapter, you will learn how
genetics influence both physiological and psychological traits. You will become familiar with the structure
and function of the nervous system. And, finally, you will learn how the nervous system interacts with the
endocrine system.
Chapter 3 | Biopsychology 73
3.1 Human Genetics
Learning Objectives
By the end of this section, you will be able to:
• Explain the basic principles of the theory of evolution by natural selection
• Describe the differences between genotype and phenotype
• Discuss how gene-environment interactions are critical for expression of physical and
psychological characteristics
Psychological researchers study genetics in order to better understand the biological basis that contributes
to certain behaviors. While all humans share certain biological mechanisms, we are each unique. And
while our bodies have many of the same parts—brains and hormones and cells with genetic codes—these
are expressed in a wide variety of behaviors, thoughts, and reactions.
Why do two people infected by the same disease have different outcomes: one surviving and one
succumbing to the ailment? How are genetic diseases passed through family lines? Are there genetic
components to psychological disorders, such as depression or schizophrenia? To what extent might there
be a psychological basis to health conditions such as childhood obesity?
To e.
Chapter 3BiopsychologyFigure 3.1 Different brain imagi.docxketurahhazelhurst
Chapter 3
Biopsychology
Figure 3.1 Different brain imaging techniques provide scientists with insight into different aspects of how the human
brain functions. Left to right, PET scan (positron emission tomography), CT scan (computed tomography), and fMRI
(functional magnetic resonance imaging) are three types of scans. (credit “left”: modification of work by Health and
Human Services Department, National Institutes of Health; credit “center": modification of work by
"Aceofhearts1968"/Wikimedia Commons; credit “right”: modification of work by Kim J, Matthews NL, Park S.)
Chapter Outline
3.1 Human Genetics
3.2 Cells of the Nervous System
3.3 Parts of the Nervous System
3.4 The Brain and Spinal Cord
3.5 The Endocrine System
Introduction
Have you ever taken a device apart to find out how it works? Many of us have done so, whether to attempt
a repair or simply to satisfy our curiosity. A device’s internal workings are often distinct from its user
interface on the outside. For example, we don’t think about microchips and circuits when we turn up
the volume on a mobile phone; instead, we think about getting the volume just right. Similarly, the inner
workings of the human body are often distinct from the external expression of those workings. It is the
job of psychologists to find the connection between these—for example, to figure out how the firings of
millions of neurons become a thought.
This chapter strives to explain the biological mechanisms that underlie behavior. These physiological and
anatomical foundations are the basis for many areas of psychology. In this chapter, you will learn how
genetics influence both physiological and psychological traits. You will become familiar with the structure
and function of the nervous system. And, finally, you will learn how the nervous system interacts with the
endocrine system.
Chapter 3 | Biopsychology 73
3.1 Human Genetics
Learning Objectives
By the end of this section, you will be able to:
• Explain the basic principles of the theory of evolution by natural selection
• Describe the differences between genotype and phenotype
• Discuss how gene-environment interactions are critical for expression of physical and
psychological characteristics
Psychological researchers study genetics in order to better understand the biological basis that contributes
to certain behaviors. While all humans share certain biological mechanisms, we are each unique. And
while our bodies have many of the same parts—brains and hormones and cells with genetic codes—these
are expressed in a wide variety of behaviors, thoughts, and reactions.
Why do two people infected by the same disease have different outcomes: one surviving and one
succumbing to the ailment? How are genetic diseases passed through family lines? Are there genetic
components to psychological disorders, such as depression or schizophrenia? To what extent might there
be a psychological basis to health conditions such as childhood obesity?
To e ...
Overview
In simpler terms, Evolutionary Genetics is the study to understand how genetic
variation leads to evolutionary change.
Evolutionary Genetics attempts to account for evolution in terms of changes in gene
and genotype frequencies within populations and the processes that convert the
variation with populations into more or less permanent variation between species.
The central challenge of Evolutionary Genetics is to describe how the evolutionary
forces shape the patterns of biodiversity.
Evolutionary Genetics majorly deals with;
a. Evolution of genome structure
b. The genetic basis of speciation and adaptation
c. Genetic change in response to selection within populations
It states that the present day complex plants and animals have evolved from earlier simpler forms of life by gradual changes. SEQUENTIAL EVOLUTION ,DIVERGENT EVOLUTION, Theories of evolution.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Welcome to the first live UiPath Community Day Dubai! Join us for this unique occasion to meet our local and global UiPath Community and leaders. You will get a full view of the MEA region's automation landscape and the AI Powered automation technology capabilities of UiPath. Also, hosted by our local partners Marc Ellis, you will enjoy a half-day packed with industry insights and automation peers networking.
📕 Curious on our agenda? Wait no more!
10:00 Welcome note - UiPath Community in Dubai
Lovely Sinha, UiPath Community Chapter Leader, UiPath MVPx3, Hyper-automation Consultant, First Abu Dhabi Bank
10:20 A UiPath cross-region MEA overview
Ashraf El Zarka, VP and Managing Director MEA, UiPath
10:35: Customer Success Journey
Deepthi Deepak, Head of Intelligent Automation CoE, First Abu Dhabi Bank
11:15 The UiPath approach to GenAI with our three principles: improve accuracy, supercharge productivity, and automate more
Boris Krumrey, Global VP, Automation Innovation, UiPath
12:15 To discover how Marc Ellis leverages tech-driven solutions in recruitment and managed services.
Brendan Lingam, Director of Sales and Business Development, Marc Ellis
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdf
Conferencia SBECH
1. THE MOST IMPORTANT THEORY IN BIOLOGY Douglas J. Futuyma Department of Ecology and Evolution State University of New York Stony Brook, NY November 2007
2. THEORY -- NOT a mere speculation! -- A statement of well-supported general laws, principles or causes of something known or observed -- Usually a complex of statements that together explain many phenomena. -- A term of honor.
3.
4. In each great region of the world the living mammals are closely related to the extinct species of the same region. It is therefore probable that Africa was formerly inhabited by extinct apes closely allied to the gorilla and chimpanzee; and as these two species are now man’s nearest allies, it is somewhat more probable that our early progenitors lived on the African continent than elsewhere. Charles Darwin, 1871 The Descent of Man Scientific theories enable prediction
9. MULTIPLE POPULATIONS, EACH UNDERGOING GENETIC DRIFT Random fluctuations in frequency of alleles that have little or no effect on fitness. Allele frequencies in replicate populations fluctuate independently, eventually reach 0 or 1.0.
10. Natural selection IS a consistent difference in the rate of increase of different genotypes or genes ( and no more than that)
11. Elementary evolutionary event is change in proportions (frequencies) of alleles in a population. These graphs show increase in frequency of one type of chromosome over generations of fruit flies in several lab populations.
12. Rapid adaptation by natural selection: Copper tolerance has evolved in Mimulus guttatus near copper mines
14. Selection on several functionally interrelated features results in complex adaptations. Adaptations may look as if they have been “ designed.”
15. But how do we explain the poinsettia ( Euphorbia pulcherrima )?
16. But how do we explain the dandelion ( Taraxacum officinale )? Natural selection lacks foresight! Bright flowers look “ designed” to attract pollinators, but pollen is sterile, reproduction is asexual Explicable only as a consequence of evolutionary history
17. Red blood cells from person with “normal” hemoglobin and with sickle-cell hemoglobin Heterozygotes are anemic but resistant to malaria. Homozygotes have sickle cell disease and usually die young.
18. Infanticide Siblicide Natural selection lacks morality. Nature is not a model for ethics. Adaptations Produced by Natural Selection
19. Evolutionary theory makes predictions about phenomena throughout biology. Evolutionary theory explains morphological, behavioral, physiological, genomic characteristics Evolutionary theory explains phenomena that make no sense unless they are results of a blind, impersonal, historical process Evolutionary theory provides cautions against looking to nature for standards of morality or ethics (the “naturalistic fallacy”).
20. THEORY -- NOT a mere speculation!! -- A statement of well-supported general laws, principles, or causes of something known or observed. -- Usually a complex of statements that together explain many phenomena. -- A term of honor. EVOLUTIONARY BIOLOGY IS USEFUL! E.g., Pest management Food production Health Human genetics and genomics Natural resource management (fisheries, forest resources) Discovery of useful natural products Environment and conservation See Evolution, Science, and Society at www.amnat.org
23. Climbing fern, invasive in Florida Everglades Can the mite Floracarus perrerae control it? Mite most effectively attacks fern from same region, so knowing source of invasive fern is important.
24. N. Ellstrand 2003. Phil. Trans. Royal Soc. Lond. B 358:1163 HYBRIDIZATION AND GENE FLOW MAY OCCUR FROM CROPS TO WILD PLANTS Knowing evolutionary relationships among plants specifies wild species that may be at greatest risk of acquiring transgenes from GM crops.
25.
26. (A) Functionally diverse genes are composed of mixtures of modules, largely due to exon shuffling (B) Distantly related animals (fly, nematode worm, human) have many of the same modules.
27. Top: Eye developed in abnormal site due to insertion of an extra Drosophila Pax-6 gene Bottom: Eyes developed in abnormal site due to insertion of human Pax-6 gene Insects and humans have functionally equivalent versions of the major gene that controls eye development.
28. a , Distribution of divergence of the autosomes (blue), the X chromosome (red) and the Y chromosome (green). b , Distribution of variation by chromosome FIGURE 1. Human-chimpanzee divergence in 1-Mb segments across the genome. From the following article: Initial sequence of the chimpanzee genome and comparison with the human genome The Chimpanzee Sequencing and Analysis Consortium Nature 437, 69-87 (1 September 2005) doi: 10.1038/nature04072
29. Mutations in genes that have important functions are likely to disrupt function, to reduce fitness, and to be eliminated from the population by natural selection. Therefore they should evolve slowly. As this theory predicts, genes that have diverged slowly between human and chimpanzee are more likely to cause disease when mutated. Sequence comparisons may therefore reveal other genes of medical importance. Bustamante et al. 2005, Nature 437:1153.
30. FINDING FUNCTIONALLY IMPORTANT SEQUENCES IN THE HUMAN GENOME Such sequences evolve slowly (are “conserved”) because most mutations impair function and are eliminated by natural selection. MCSs, Multispecies Conserved Sequences, are very similar among many species, including distantly related to human. Upper: Conserved human sequences found by match to various species and to All together. Note: more in noncoding regions (green) than in coding regions (yellow). Lower: Example of a noncoding region so found. EH Margulies et al. 2003. Genome Research.
35. Nothing in biology makes sense except in the light of evolution. Theodosius Dobzhansky There are many generalizations in biology, but precious few theories. Among these, the theory of evolution is by far the most important, because it draws together from the most varied sources a mass of observations which would otherwise remain isolated; it unites all the disciplines concerned with living beings; it provides a causal explanation of the living world and its heterogeneity. Fran ç ois Jacob
36.
37.
38.
39.
40.
41.
42. Zygon Volume 39, Issue 3 Page 659 - September 2004 Was Thomas Aquinas a Sociobiologist? Thomistic Natural Law, Rational Goods, and Sociobiology by Craig A. Boyd 1 Journal of Organizational Behavior Volume 27, Issue 2 , Pages 111 - 119 a Special Issue: Darwinian Perspectives on Behavior in Organizations . Darwinism: new paradigm for organizational behavior? The evolution of human homosexual behavior (1). R. C. Kirkpatrick. Current Anthropology 41:385 (June 2000) by Craig A. Boyd 1 Was Thomas Aquinas a Sociobiologist? Thomistic Natural Law, Rational Goods, and Sociobiology Volume 39 Issue 3 Zygon Volume 39 Page 659 - September 2004 doi:10.1111/j.1467-9744.2004.t01-1-00607.x
45. THEORY -- NOT a mere speculation!! -- A statement of well-supported general laws, principles, or causes of something known or observed. -- Usually a complex of statements that together explain many phenomena. -- A term of honor.
46.
47.
48. Analysis of variation in DNA sequence of a gene among humans can tell us if the gene has been strongly affected by natural selection: Positive selection: an advantageous allele has increased in a population Negative selection: Mutations that affect protein function have been continually purged (showing that the protein has a consistent and important function).
49. Positive selection on human genes in last 10,000 years Suggests adaptation to new environmental conditions taste and smell reproduction carb metabolism Also: lactose metabolism skin pigmentation hair formation Voight et al. 2006. PLoS Biology 4:e72
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51. EVOLUTION BY POSITIVE NATURAL SELECTION IN VIRUSES DEPENDS ON TRANSMISSION MODE Selection indicated by high values of dn/dS (amino acid-changing nucleotide substitutions/synonymous substitutions). Significantly high dN/dS much more frequent in genes for surface proteins of non-vector-borne than vector-borne viruses. Suggests conflict between adaptation to human immune system and insect vector’s immune system. May help in design of vaccines and antiviral agents. CH Woelk and EC Holmes, 2002. Mol. Biol. Evol. 19:2333.
52. FIGURE 2. Conservation of synteny between human and mouse. Initial sequencing and comparative analysis of the mouse genome Mouse Genome Sequencing Consortium Nature 420, 520-562 (5 December 2002) doi: 10.1038/nature01262 We detected 558,000 highly conserved, reciprocally unique landmarks within the mouse and human genomes, which can be joined into conserved syntenic segments and blocks (defined in text). A typical 510-kb segment of mouse chromosome 12 that shares common ancestry with a 600-kb section of human chromosome 14 is shown. Blue lines connect the reciprocal unique matches in the two genomes. The cyan bars represent sequence coverage in each of the two genomes for the regions. In general, the landmarks in the mouse genome are more closely spaced, reflecting the 14% smaller overall genome size.
53. Infectious disease evolution of antibiotic resistance tracing origin and spread of disease evolution of virulence
54. JK Taubenberger et al. 2005, Nature 437-889 FLU EPIDEMICS PAST AND PRESENT ‘ Spanish” pandemic (1918) and the 1957 and 1968 epidemics are relatd to and derived from avian influenza strains. 1918, 1957, and 1968 strains all differ from avian strains by 10 amino acids, in the 3 proteins. These are thought to confer adaptation to human host, although probably reducing adaptation to avian hosts. Most of these amino acid substitutions are also found in recent, pathogenic “bird flu,” strain H5N1
58. Gorilla Pan Homo … but … but Homo and Pan are actually most closely related. Morphology of Homo has evolved faster than morphology of Pan since their common ancestor.
59. t Tt T t t t t t t + Tt tt tt tt tt tt tt Mouse T-locus: Meiotic drive sperms Eggs (male) offspring Heterozygous male tt males are lethal or sterile!!
60. a , Evolutionary tree. The branch lengths are proportional to the absolute rates of amino acid divergence. b , Maximum-likelihood estimates of the rates of evolution in protein-coding genes for humans, chimpanzees, mice and rats. FIGURE 9. Human−chimpanzee−mouse−rat tree with branch-specific K A/ K S ( ) values.
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62. IGF2 IGF2R IGF2 IGF2R IGF2R (IGF2R) (IGF2) IGF2 Egg Sperm Embryo Only paternal IGF2 gene is expressed; increases embryo’s uptake of nutrients from mother through placenta. Only maternal IGF2R gene is expressed; degrades IGF2, reducing embryo’s uptake of nutrients from mom, who defends herself against her baby! GENETIC CONFLICT IN MAMMALS