Here's why:
* Meiosis is the process of cell division that produces gametes (sperm and egg cells). It involves two rounds of division, reducing the chromosome number from diploid (two sets) to haploid (one set). The law of independent assortment applies during the first meiotic division.
* Mitosis is the process of cell division that produces two identical daughter cells. It involves one round of division where chromosomes are duplicated and distributed equally to the two daughter cells.
Here's how the law of independent assortment works in meiosis:
* During the first meiotic division, homologous chromosomes (pairs of chromosomes, one from each parent) line up randomly at the center of the cell.
* This random alignment means that the maternal and paternal chromosomes in a pair can be separated into either daughter cell independently of other chromosome pairs.
* This independent assortment of chromosomes leads to genetic diversity in offspring.
In mitosis, there is no independent assortment of chromosomes because:
* The chromosomes are already duplicated and paired up (sister chromatids) before the division.
* The sister chromatids are attached and separate during mitosis, ensuring identical copies are distributed to the daughter cells.
Therefore, the law of independent assortment is crucial for meiosis, which generates genetic variation, but not for mitosis, which is primarily for growth and repair.
