Crossing Over ___________________

Question

Crossing over ___________________.  
A) increases variability in gametes
B) happens only once per homologous pair
C) occurs between sister chromatids
D) prevents genetic recombination
E) is followed immediately by separation of the chromatids

Accepted Answer

Crossing over between homologous chromosomes during meiosis results in the exchange of genetic material between the two chromosomes, increasing the variability of gametes. This occurs multiple times per homologous pair and involves the exchange of non-sister chromatids.