Crossing over occurs when

A.) sister chromatids are pulled apart at the centromere during anaphase II.

B.) homologous chromosomes join together to form tetrads during prophase I.

C.) chromosomes are grouped together into new nuclei during telophase II.

D.) tetrads of homologous chromosomes randomly line up in metaphase I.

Question

Biology

Kelsey

20 April, 17:48

Crossing over occurs when

A.) sister chromatids are pulled apart at the centromere during anaphase II.

B.) homologous chromosomes join together to form tetrads during prophase I.

C.) chromosomes are grouped together into new nuclei during telophase II.

D.) tetrads of homologous chromosomes randomly line up in metaphase I.

+4

Answers (1)

Know the Answer?

Karissa Huff · Answer 1

During meiosis 1, prophase 1 Each chromosome form tetrads and and become more and more condensed. This is when crossing over occurs. So your answer is B.