Cell division occurs through two main processes - mitosis and meiosis. Mitosis produces two identical daughter cells during normal growth and tissue repair. Meiosis produces four non-identical haploid daughter cells from a single diploid parent cell, which occurs during gamete formation. This introduces genetic diversity when gametes fuse during fertilization. The key events of meiosis include homologous chromosome pairing during prophase I and their subsequent separation in anaphase I, followed by two rounds of chromosome separation to form four unique haploid cells.
It is the presentation on the MEIOSIS phase of the Cell division.
It includes all the details and definitions that are related to the topic of meiosis with the labelled diagrams.
If you have any query or a question, you may ask in the comment box.
thanks.
It is the presentation on the MEIOSIS phase of the Cell division.
It includes all the details and definitions that are related to the topic of meiosis with the labelled diagrams.
If you have any query or a question, you may ask in the comment box.
thanks.
-Cell Division Process In Prokaryotes & Eukaryotes
-Compacting DNA into Chromosomes
-Types of Cell Reproduction
-Phases of the Cell Cycle
-Mitosis
-Meiosis
-Oogenesis & Spermatogenesis
-Comparison of Divisions
Cell cycle and mitosis presentation (3)Ritu Sharma
The cell cycle is an ordered set of events, culminating in cell growth and division into two daughter cell.Cell division and tissue growth is a controlled and complex process. Cancer is a disease where regulation of the cell cycle goes messy and normal cell growth and behavior is lost.
This is a presentation on the cellular level of reproduction created by reynario c ruiz jr in compliance for his diploma on professional education at cebu normal university college of teacher education
OVERVIEW OF CELL CYCLE
Explained in brief phases of cell cycle . Given a explanation of each phase in detail, also explained the significance of meiosis in brief.
Infer the significance of cell division.
Differentiate a DNA molecule, a chromosome, and a chromatid.
Characterize the phases of the cell cycle and their control points.
Describe the major events associated with stages of mitosis.
Explain the process of cytokinesis.
Learning Objectives
Describe the role of apoptosis in the life cycle of a cell.
Relate cancer as a result of the malfunction of the cell during the cell cycle.
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!
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
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
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.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
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.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
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.
3. Cell Division Cycle Is essential for Growth Mother and daughter cells are identical Maintenance Cell turnover Components of the nucleus and cytoplasm divide during cell cycle Cytokinesis is the division of the cytoplasm
4. Cell Cycle Control of cell division is complex & precise Steps occur in sequence Must know when to proceed/wait
6. Normal Growth Conditions Protein content increases RNA synthesis continues, except during cell division (M phase) Overall growth is a steady process
7. Interphase Decision making time for cell Should cell replicate?? Mitosis?? Can lead to cancer Often looks like nothing is happening Makes up 90% of the time Has 3 subphases G1 – separates the end of mitosis from the next round of DNA replication S phase – DNA replication G2 phase – gap between S phase and Mitosis Cells can remain in G1 for weeks or even years
8. G0 Phase There are times when a cell will leave the cycle and quit dividing. This may be a temporary resting period Can be permanent ie a cell that has reached an end stage of development and will no longer divide (e.g. neuron).
9. G1 phase Cells increase in size Produce RNA and synthesize protein. An important cell cycle control mechanism activated during this period (G1 Checkpoint) ensures that everything is ready for DNA synthesis.
10. S Phase To produce two similar daughter cells the complete DNA instructions in the cell must be duplicated. DNA replication occurs during this S (synthesis) phase.
11. G2 Phase Cells continue to grow and produce new proteins. At the end of this gap is another control checkpoint (G2 Checkpoint) to determine if the cell can now proceed to enter M (mitosis) and divide.
19. Mitosis Mitosis = process of nuclear division Occurs in somatic cells (not germ-line) http://www.rebeccastmartin.com/mnemonicdevices/phasescelldevelopment.htm
20. Mitosis M-Phase is divided into 6 stages Based on observations using the light microscope on living cells and a mixture of light and electron microscopy Interphase Prophase Prometaphase Metaphase Anaphase Telophase cytokinesis (non-nuclear)
21. Mitosis - Prophase Prophase (beginning of mitosis) Transition from G2 to M is not clear Chromosomes condense (shorted and thicken) Nuclear envelope disintegrates Chromosomes are composed of 2 identical (sister) chromatids Centromeres have divided but remain together Spindle fibres begin to grow from the centrosome
22. Mitosis - Metaphase Chromosomes move to the equator of the cell (metaphase plate) Spindle fibres become attached to the sister chromatids Spindle apparatus is complete
23. Mitosis - Anaphase Sister chromatids begin to separate and form chromosomes Chromatids move towards opposite poles (1 um per minute Can be delayed until all chromosomes are on the metaphase plate
24. Mitosis - Telophase Sister chromatids arrive at opposite poles Reverses the steps of prophase to return to interphase Chromosomes uncoil & protein synthesis begins Nuclear envelope reforms Cytokinesis takes place Cell entered G1 phase
32. What is meiosis? Gamete formation Sperm/pollen and egg From diploid (2 copies) to haploid (1 copy) Resorted NOT doubled 4 daughter cells contain a complete set of chromosomes Promotes genetic diversity http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=mboc4.figgrp.3679
33. Genetic Diversity Meiosis gives rise to genetic diversity Crossing over Occurs between homologous chromosomes not sister chromatids Chance combination of gametes during fertilisation Genetically diverse sperm and eggs can unite
34. Meiosis Involves two cell Divisions Meiosis I – a reduction from 2n to 1n Meiosis II resembles mitosis (1n to 1n)
35. Meiosis – Prohase I Similar to prophase of mitosis chromosome duplication & spindle formation Chromosomes condense and are attached to the nuclear membrane Paring of homologous chromosomes Homologous chromosomes join along their length Chromosomes fuse together and are referred to as bivalents
36. Overview of DNA Synthesis In each cycle of cell division, the cell first makes a copy of all of the DNA in each of the chromosomes http://student.ccbcmd.edu/~gkaiser/biotutorials/dna/fg13.html
38. Crossing Over Homologous chromosomes Chiasma Recombinant chromatids Adjecent homologous chromosomes break and swap genetic material Greatly increases the genetic variation Tetrads form chiasmata, X shapped configuration that marks crossing over http://www.unis.org/UNIScienceNet/IBHbio2_knowledge.html
39. Meiosis - Metaphase I Nuclear membrane breakdown Development and attachment of the machinery to pull the tetrads (chromosomes) apart (kinetochore & microtubules) Tetrads move to the equatorial plate There is no splitting of the sister chromatids like mitosis
40. Meiosis – Anaphase I Cohesin breaks down between the centromeres homologous chromosomes are pulled apart Called a reductional division For every tetrad there is now 1 chromosome in the form of a chromatid pair called a dyad Located at each pole Each daughter cell is haploid
41. Meiosis - Telophase I & Prophase II Telophase I does not occur in all species Chromosomes enter an interphase configuration as cytokinesis takes place No chromosome duplication occurs Nuclear envelope reforms Cell enters Prophase II
42. Meiosis II – Prophase II Meiosis II is basically a mitotic division Chromatids from each chromosome are pulled apart to opposite poles For each original cell entering Meiosis I, 4 haploid cells emerge at telophase II Meiosis II is an equational division Reduces the amount of genetic material per cell by half, does not reduce the chromosome number by 2
43. Cell Division - Cytokinesis Contractile ring forms Does not always occur after mitosis Start by a furrowing of the membrane Organelles need to be produced need not be distributed equally between daughter cells http://www.sparknotes.com/biology/cellreproduction/mitosis/section3.rhtml