Here's a breakdown:
* Mitosis: This is the process of regular cell division used for growth and repair. It produces two identical daughter cells, each with the same number of chromosomes as the parent cell. This is because the parent cell replicates its DNA before dividing, ensuring each daughter cell gets a complete set.
* Meiosis: This is the process of cell division used to produce gametes (sperm and egg cells). It produces four daughter cells, each with half the number of chromosomes as the parent cell. This reduction in chromosome number is essential for sexual reproduction. Here's why:
* Fertilization: When a sperm cell fertilizes an egg cell, the resulting zygote receives half its chromosomes from the sperm and half from the egg. This ensures that the offspring inherits the correct number of chromosomes.
* Genetic Diversity: Meiosis involves two rounds of cell division, with a special step called crossing over that shuffles genetic material between homologous chromosomes. This shuffling contributes to the genetic diversity of offspring.
In summary:
* Mitosis maintains the chromosome number of the parent cell.
* Meiosis reduces the chromosome number to half, preparing for sexual reproduction.
This difference in chromosome number is fundamental to the distinct roles of mitosis and meiosis in the life cycle of organisms.
