Crossing over of homologous chromosomes does not occur.Group of answer choicesmitosis onlyneither mitosis nor meiosismeiosis onlyboth mitosis and meiosisNext

Breakdown the Problem

1. Identify the processes of cell division being discussed: mitosis and meiosis.
2. Determine whether crossing over occurs in either or both processes.

Relevant Concepts

1. Mitosis: A type of cell division that results in two daughter cells, identical to the parent cell. Crossing over does not occur in mitosis.
2. Meiosis: A type of cell division that produces gametes (sperm and eggs) with half the number of chromosomes. During meiosis, crossing over occurs between homologous chromosomes in prophase I.

Analysis and Detail

1. In mitosis, homologous chromosomes do not pair up; hence, there is no opportunity for crossing over.
2. In meiosis, particularly during prophase I, homologous chromosomes align closely and exchange genetic material through crossing over, which increases genetic diversity.

Verify and Summarize

• Mitosis does not involve crossing over.
• Meiosis does involve crossing over.
• Therefore, crossing over of homologous chromosomes does not occur in mitosis.

Final Answer

Crossing over of homologous chromosomes does not occur in mitosis only.