AP BIOLOGY

Detailed explanation-1: -In the early stages of meiosis, the process of replication copies the DNA to produce chromosomes with two sister chromatids (see Figure 1).

Detailed explanation-2: -Meiosis also produces genetic variation by way of the process of recombination. Later, this variation is increased even further when two gametes unite during fertilization, thereby creating offspring with unique combinations of DNA.

Detailed explanation-3: -During meiosis I, the random orientation of the maternal and paternal chromosomes can lead to variation. The exchange of genetic information between homologous chromosomes also induces variation. The random orientation of sister chromatids in meiosis II also generates genetic variation.