Principles of Inheritance and Variation Question 124
124. Crossing over that results in genetic recombination in higher organisms occurs between
[2004]
(a) sister chromatids of a bivalent
(b) non-sister chromatids of a bivalent
(c) two daughter nuclei
(d) two different bivalents
Show Answer
Answer : b
Hints & Solution
(b) Crossing over occurs between non-sister chromatids of two homologous chromosomes. Homologous chromosomes form bivalent. Crossing over occurs between chromosomes in a nucleus.
