A) sister chromatids of homologous chromosome
B) non-sister chromatids of homologous chromosome
C) sister chromatids of non-homologou chromosome
D) non-homologous chromatids of homologous chromosome
Correct Answer: B
Solution :
Crossing over is the exchange of chromosomal segments between nonsister chromatids of homologous chromosomes. It occurs during pachytene stage of meiotic division. The crossing over creates variations in the organisms.
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