When Does Crossing-Over Occur

Question

When does crossing-over occur?
A)Prophase I of meiosis
B)Prophase II of meiosis
C)Interphase prior to meiosis
D)At any time during the second meiotic division
E)At any time throughout division

Accepted Answer

Crossing-over occurs during Prophase I of meiosis, which is before the first division of meiosis. This is when homologous chromosomes pair up and exchange genetic material, leading to genetic diversity in the resulting gametes.