Crossing-over takes place in bivalents (tetrads)consisting of ________ chromatids, and one crossover involves ________ chromatids.
A)2; 2
B)2; 4
C)4; 2
D)4; 4
E)8; 4

Question

Quizplus · Accepted Answer

Crossing-over occurs in bivalents or tetrads, which consist of 4 chromatids. However, any single crossover event involves only 2 of these 4 chromatids exchanging genetic material.

Crossing-Over Takes Place in Bivalents (Tetrads)consisting of ________ Chromatids, and One