"Crossing-Over" of Genes Among Homologous Chromosomes Occurs During

Question

"Crossing-over" of genes among homologous chromosomes occurs during
A)spermiogenesis
B)differentiation of spermatogonium to a primary spermatocyte
C)meiosis I
D)meiosis II
E)none of the choices is correct

Accepted Answer

Crossing-over of genes among homologous chromosomes occurs during meiosis I, specifically during prophase I. This is the process in which corresponding segments of non-sister chromatids are exchanged between homologous chromosomes, resulting in genetic recombination. This increases genetic diversity and variation among offspring.