Category
By Befitbu Health Desk May 16, 2024
HEALTH
Meiosis Definition
Meiosis is a specialized form of cell division essential for sexual reproduction, where one diploid parent cell produces four genetically diverse haploid cells.
Meiosis Phases
Meiosis involves two divisions: Meiosis I and Meiosis II, each with stages like Prophase, Metaphase, Anaphase, and Telophase, facilitating chromosome reduction.
Prophase I
Chromosomes pair up and exchange genetic material in a process called crossing over, enhancing genetic diversity.
Metaphase I
Homologous chromosome pairs align at the equatorial plane, preparing for chromosome reduction.
Anaphase I
Homologous chromosomes separate, reducing the chromosome number by half.
Telophase I & Cytokinesis
The cell divides, forming two haploid cells, each containing sister chromatids.
Meiosis II
Sister chromatids are separated, resulting in four haploid gametes.
Genetic Diversity
Meiosis generates genetic diversity through independent assortment and crossing over, crucial for offspring uniqueness.
Formation of Gametes
Meiosis produces sperm and eggs, with sperm formation resulting in four sperm cells and egg formation producing one egg and three polar bodies.
Biological Significance
Meiosis ensures stable chromosome numbers, promotes genetic diversity, and drives evolution, enhancing adaptation and survival.