Key differences between Meiosis I, Meiosis II & Mitosis


Key differences between Meiosis I, Meiosis II & Mitosis

Meiosis I:

1. Reduces chromosome number : Separates homologous chromosomes, reducing the chromosome number by half.
2. Genetic recombination: Involves crossing over and independent assortment, increasing genetic diversity.

Mitosis:

1. Maintains chromosome number : Separates sister chromatids, resulting in genetically identical daughter cells.
2. No genetic recombination : No crossing over or independent assortment occurs.

Meiosis II:


1. Similar to Mitosis: Separates sister chromatids, ensuring each gamete receives a single copy of each chromosome.
2. No reduction in chromosome number: Just like mitosis, Meiosis II maintains the haploid state.

So, while Meiosis I is unique, Meiosis II shares similarities with Mitosis.

- Drx. MANSI

Comments

Post a Comment

Popular posts from this blog

Unveiling Mansi's Corner of Cells & Science: Where Biology meets passion☺️❣️

Image
 🌿 Mansi's Corner of Cells & Science welcomes you all! 👩‍🔬 About Me Hi! I am Drx. Mansi Tiwari, a pharmacy graduate with a dynamic career rooted in international healthcare innovation. My professional expertise spans the medical device industry, specifically with Medtronic—an acclaimed, U.S.-based global leader in medical technology.☺️ Professional Journey💊 Academic Credentials: Graduated with a degree in pharmacy, equipped with an in-depth grasp of pharmacological sciences, therapeutics, and pharmaceutical care. Corporate Experience: Gained hands-on experience at Medtronic, where I contributed to high-impact projects, collaborated with thought leaders, and engaged with cutting-edge developments in medical devices.☺️ Commitment to Growth: Currently furthering my academic pursuits, remaining committed to continual learning and staying at the forefront of healthcare advancements.🥰 📚 Why This Blog? Working with students from Class 9 to 12, I noticed a recurring issue:  ...
Read more

Life Process - 1 [ Cell Division : Mitosis ]

Image
🌱 What is Mitosis? Mitosis is the process by which a single cell divides to form two identical daughter cells . This is how your body grows, repairs wounds, and replaces old cells. 🔄 Steps of Mitosis (in Simple Words): DNA Doubling The cell first copies its DNA: 2n → 4n (Double chromosomes) Prophase Chromosomes become visible. Nuclear membrane breaks down. Spindle fibers start forming. Metaphase Chromosomes line up in the center. Spindle fibers attach to them. Anaphase Each chromosome splits. The two halves (sister chromatids) move to opposite ends. Telophase New nuclear membranes form. Chromosomes become thin and invisible again. Cytokinesis (Cell Splitting) In animal cells , a notch forms in the middle and pinches off. In plant cells , a cell plate forms in the center. Result: 2 identical cells, each with same number of chromosomes as the original.
Read more

Revolutions & Agricultural aspects

Important Stages in Agricultural Development A. Green Revolution  * Problem: The problems of population explosion started in the 20th century, and many underdeveloped countries were badly affected by low-quality food, poor availability, and a lack of quality seeds.  * Solution: Various methods applied for harvesting maximum yield from minimum land are collectively called the Green Revolution.  * Key Efforts:    * Improved dwarf varieties of wheat and rice were developed.    * Fertilizers and pesticides were used more efficiently.    * Better water management techniques were implemented.  * Pioneers: The increased production of food grains helped save large populations from hunger. This was made possible by the contributions of scientists like Dr. Norman Borlaug (USA) and Dr. M. S. Swaminathan (India). B. White Revolution  * Goal: To meet the needs of milk and milk products in various parts of India, especially in far-flung regions. ...
Read more