Dominant traits are caused by a single allele masking the phenotype of the other allele. Recessive traits require inheriting two copies of the recessive allele to manifest. Gregor Mendel established that purple flower color in peas was dominant over white, as peas needed only one purple allele. When heterozygous, the dominant trait manifests as the recessive allele remains inactive. Examples show homozygous dominant as AA, heterozygous dominant as Aa displaying the dominant trait, and homozygous recessive as aa.
GENE SEGREGATION & INTEGRATION
A. Law of Segregation
•B. Law of Independent Assortment
•C. Segregation and Assortment in Haploid Organisms
•D. Dominance Relationship
•E. Multiple Alleles
•F. Lethal Genes
GENE SEGREGATION & INTEGRATION
A. Law of Segregation
•B. Law of Independent Assortment
•C. Segregation and Assortment in Haploid Organisms
•D. Dominance Relationship
•E. Multiple Alleles
•F. Lethal Genes
Biology 103 Laboratory Exercise – Genetic Problems
Introduction
Although the science of genetics has become a highly sophisticated discipline dealing
with the interactions of hereditary factors at the molecular level, it has its roots in the
basic laws of heredity initially discovered and presented by Gregor Mendel more than
one hundred years ago. Mendel's success in discovering these laws was due largely to his
application of the simple rules of mathematical probability - the laws of chance - to his
observations concerning the inheritance of certain characteristics in the garden pea plant.
Reginald Punnett and the Punnett Square
The Punnett square is a diagram used by biologists to determine genotypic probability
within the offspring from a particular genetic cross. The Punnett square shows every
possible genotypic combination of maternal alleles with the paternal alleles for a genetic
cross. Punnett squares only give probabilities for genotypes, not phenotypes. The square
diagram was designed by the British geneticist, Reginald Punnett (1865-1967) and first
presented to the science community in 1905. Punnett’s Mendelism (1905) is considered
the first popular science book to introduce genetics to the public.
Solving Genetic Problems
R
R'
R
RR RR'
R'
RR' R'R'
Maternal alleles
A
A
a
Aa
Aa
Paternal
Alleles
a
Aa
Aa
The first step in solving a genetic problem is to establish the genetic symbols you will use
in your problem solution. Stay consistent by using these same symbols throughout the
problem solving process.
Represent dominant and recessive alleles (different forms of a gene) using traditional
genetic symbols. Dominant alleles should be represented with the capital version of an
alphabetic letter while using the lower case version to show recessiveness. For example:
B = black color, b = white color.
Each individual gene or trait is diploid (2n) in nature and therefore, must be represented
with two alleles. Continuing with the alleles mentioned previously, an individual may
have the genetic makeup BB, Bb, or bb when using those alleles.
Remember that gametes (sperm and egg) are haploid (n) and can only provide one allele
per trait. For example: B or b
An individual’s genotype contains the possible gametes that can be expected to be
produced by that individual. Much of genetics revolves around the probability of the
makeup of gametes. If the individual is homozygous, all of the gametes produced will
possess the same kind of allele. For example, an individual with the genotype BB would
be expected to produce only B gametes and individuals with genotype bb would produce
only b gametes.
If the individual is heterozygous, that is the individual’s genotype contains one dominant
allele and one recessive allele (Bb), the gametes produced will possess one or the other of
the two forms of the gene – B or b. ...
Allelic and Non-allelic interactions : Complete dominance; Incomplete dominance-in Four O'clock plant, Mirabilis jalapa and Snapdragon, Antirrhinum majus ; Co-dominance- MN blood group, AB blood group, Roan coat colour in shorthorn breed of cattle; Inheritance of Comb pattern in Poultry; Epistasis -Dominant - Fruit colour in Summer squash, Recessive - Coat colour in mice; Complementary gene interaction -Purple flower colour in Sweet pea (Lathyrus odoratus)
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
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Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
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Model Attribute Check Company Auto PropertyCeline George
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Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2. DOM I NA NC E T R A I T S :
Dominance in genetics is a relationship between two alleles of a gene, in
which one allele masks the phenotype (the expression that we can see in the
outside) of another allele at the same genetics.
3. R E C E S S IV E T R A IT S :
A recessive trait is a trait caused by a recessive gene, which means
that someone must inherit two copies of the gene for the trait to
manifest.
When organisms such as humans reproduce, they produce young
with a genetic inheritance from both parents, caused by the fusing of
haploid sperm with haploid eggs to create a diploid organism.(In our
case we have 46 chromosomes, 23 comes from each parent), so
each chromosome contains a series of alleles or genes which code
various information.
4.
5. E X P L A N A T IO N :
When someone is heterozygous, however, one of the alleles will remain
inactive, and this allele represents a recessive trait.
Gregor Mendel(considered the father od genetics beacuse of his experiments
on the fields)did much of his work with peas. In the course of his research, he
learned that purple was a dominant trait for flower color, meaning that a flower only
had to inherit one purple gene to produce purple flowers.
When someone is heterozygous for a trait, the difference between dominant and
recessive traits becomes more important, because the dominant trait is the one
which will manifest.
6. F O R E XA M P L E :
When the alleles from both parents are the same(AAAA), someone is said to
be homozygous at that allele. If a child inherits two different alleles, such as a
gene for red hair(RR) and a gene for brown hair(BB), he or she is said to be
heterozygous at that allele:
When someone inherits the same allele twice,, that trait will manifest
whether or not it is dominant.
When someone is heterozygous, however, one of the alleles will
remain inactive, and this allele represents a recessive trait.
7.
8. E XA M P L E S
In the simplest case, where a gene exists in two allelic forms ( A and b),
three combinations of genotypes(alleles) are possible:
AA: Homozygotic dominant.
Ab: Heterozygotic dominat.
bb:HOmozygotic recessive.
If AA and bb individuals (homozygotics) show different forms of the trait
(phenotype), and Ab individuals (heterozygotics) show the same phenotype
as AA individuals, then allele A is said to dominate or be dominant to or
show dominance to allele b, and b is said to be recessive to A.
9. E XA M P L E S :
1The language of genetics consists of symbols and rules for using these symbols.When the
trait that we are studying is dominant we use a capital letter to show its symbol. When we
represent the recessive trait from the same trait we put the same letter but not capitalized.
EXAMPLE:
If we have a tall pea plant dominat iver a short pea plant it will be represented like that:
Dominan(tall): T
Recessive(short): t
2The following letters represent pairs of alleles.we have to indicate whether each pair is a
heterozygote(hybrid) or homozygote(purebrid).Later we can indicate whether each pair would
display a dominant or recessive phenotype
DD:Homozygotic dominant Dd:Heterozygotic dominant
ss:Hmozygotic recessive Rr: Heterozygotic dominant
Tt:Heterozygotic dominant yy:Homozygotic recessive
10. S OURC ES :
I've got my information from these places:
http://www.wisegeek.com/whatisarecessivetrait.htm
http://en.wikipedia.org/wiki/Dominance_(genetics)
My notebook and my own nowledge.