How does the anaphase stage differ in the two phases of meiosis?
1 Answer
Meiosis I is reductional division and meiosis II is equational division. In anaphase I homologous chromosomes separate; in anaphase II, sister chromatids separate.
Explanation:
Meiosis takes place in a diploid cell, to produce 4 haploid gametes. Meiosis starts with paired, replicated chromosomes in cell. Each chromosome shows two chromatids.
To reduce the number of chromosomes in half, anaphase I shows migration of one homologous chromosome to one pole and migration of corresponding pair to opposite pole .
At the end of meiosis I, two resulting cells are with exactly half number of chromosomes compared to the parent cell: but each chromosome is made up of two chromatids.
In anaphase II of meiosis, chromatid separation takes place (like mitotic division) . Each chromosome separates in two chramatids which were joined at centromere. Separated chromatids travel to opposite poles.
At the end of meiosis II, there are four daughter cells, each with half the number of chromosomes.
