1. Number of Chromosomes:
* Original cell (Diploid): Contains two sets of chromosomes (2n), one set from each parent.
* Meiosis products (Haploid): Contain only one set of chromosomes (n). This is achieved through two rounds of division.
2. Genetic Composition:
* Original cell: Chromosomes are homologous, meaning they carry the same genes but may have different versions (alleles) of those genes.
* Meiosis products: Each daughter cell receives a unique combination of chromosomes, resulting in genetic diversity. This is due to:
* Crossing over: Exchange of genetic material between homologous chromosomes during prophase I.
* Independent assortment: Random separation of homologous chromosome pairs during metaphase I and II.
3. Function:
* Original cell: Usually a germ cell destined to produce gametes (sperm or egg cells).
* Meiosis products: Gametes, which are specialized cells involved in sexual reproduction.
Summary:
Meiosis is a specialized cell division that produces four haploid daughter cells, each genetically unique from the original diploid cell and from each other. This process ensures that offspring inherit a mix of genetic material from both parents, contributing to genetic diversity within a species.
