Question

Crossing-over occurs between 

(A) non-sister chromatids of homologous chromosome at pachytene stage of prophase–I 

(B) non-sister chromatids of non-homologous chromosomes at pachytene stage of prophase–I 

(C) non-sister chromatids of homologous chromosome at zygotene stage of prophase–I 

(D) More than one of the above (E) None of the above

Answer 1

Correct option is (A) non-sister chromatids of homologous chromosome at pachytene stage of prophase–I