Recall Mendels law of segregation for autosomal alleles D and d and consider the behavior of homologous chromosomes in meiosis.

Suppose a crossover occurs between the homologous chromosomes. At what stage or stages of M phase could alleles D and d segregate?

A) prophase
B) telophase I or II
C) metaphase I
D) anaphase I or II

D

Explanation:

Homologous chromosomes are similar but non-identical chromosomes received from each parent. They are non-identical in the sense that they may contain different alleles for the same gene. For example, in this case, D and d alleles on each homologue. These homologous chromosomes are usually involved in meiotic division, which occurs in a two-step division process; Meiosis I and II.

In meiosis I, homologous chromosomes separate/pulls apart, specifically during the anaphase stage. Alleles D and d borne on the HOMOLOGOUS pair of chromosomes are separated in the process with each of them going to either pole of the cell, according to Mendel's law of segregation.

that is true   : ) hope this you

i believe the answer would be b. hope it : )