which of the following is a difference between Phase 1 and Phase 2 of meiosis
One key difference between Phase 1 (meiosis I) and Phase 2 (meiosis II) of meiosis is the number of divisions that occur.
In meiosis I, there is a single division that separates homologous chromosomes, while in meiosis II, there is a second division that separates sister chromatids. This means that meiosis I reduces the chromosome number from diploid (2n) to haploid (n), while meiosis II maintains the haploid chromosome number.
Another difference is the occurrence of crossing over, also known as genetic recombination. This process occurs during Prophase I of meiosis I and involves the exchange of genetic material between homologous chromosomes. Crossing over increases genetic diversity in offspring by creating new combinations of alleles.
Lastly, during meiosis II, the sister chromatids separate and migrate to opposite poles of the cell, similar to mitosis. In meiosis I, the homologous chromosomes separate and migrate to opposite poles.