Question

Which correctly describes crossing over?
the process whereby nonsister chromatids exchange genetic material
the process whereby homologous chromosomes are pulled to opposite poles of the cell
the process whereby sister chromatids are pulled to opposite poles of the cell
the process whereby homologous chromosome pairs align randomly along the metaphase plate

Answer 1

Answer:

a. the process whereby nonsister chromatids exchange genetic material

Explanation:

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Answer 2

Crossing over is the process whereby non-sister chromatids exchange genetic material.

Explanation:

• Crossing over is the swapping of genetic material that occurs in the germline.
• Crossing over is a basic concept of genetics and cell biology often called recombination.
• Crossing over is the exchange of chromosome segments between non-sister chromatids during the production of gametes.
• The large-scale effect of crossing over is to spread variation through a population.
• Crossing over occurs between prophase I and metaphase I and forms two recombinant chromosome sister chromatids.