The pairing of chromosomes and crossing over occur during
A) metaphase I.
B) anaphase II.
C) prophase I.
D) prophase II.
E) more than one of these.

Question

Quizplus · Accepted Answer

The pairing of chromosomes occurs during prophase I of meiosis, while crossing over occurs during the same phase. During prophase I, homologous chromosomes pair up and form tetrads, where crossing over can occur between non-sister chromatids. The other options listed do not involve the pairing of homologous chromosomes or the process of crossing over.

The Pairing of Chromosomes and Crossing Over Occur During