In genetics, the phenomenon known as crossing over occurs when
A) two chromosomes are passed on together.
B) part of a chromosome breaks off and reattaches itself to a different chromosome.
C) two genes near each other on the same chromosome have an effect on a trait.
D) there is discontinuous variation.

Question

Quizplus · Accepted Answer

Crossing over involves the exchange of genetic material between homologous chromosomes, where parts of a chromosome break off and reattach to a different chromosome, leading to genetic variation.

In Genetics, the Phenomenon Known as Crossing Over Occurs When