Crossing over is
A) the place on a homologous pair of chromosomes at which a physical exchange occurs.
B) the reciprocal exchange of homologous regions of chromatids.
C) an event that only takes place during meiosis.
D) not useful in mapping genes.
E) an extremely rare event.

Question

Quizplus · Accepted Answer

Crossing over is the reciprocal exchange of homologous regions of chromatids, which occurs during meiosis and is important for genetic diversity and gene mapping.

Crossing Over Is