Question

Which phrase best describes the process of crossing over?
A: Pairs of homologous chromosomes exchange segments.
B: Pairs of sister chromatids exchange segments.
C: Pairs of homologous chromosomes become linked.
D: Pairs of sister chromatids become linked.

Answer 1

Answer:

A

Explanation:

Answer 2

Pairs of homologous chromosomes exchange segments is the phrase that best describes the process of crossing over.

The process of crossing over is the exchange of genetic material specifically of a DNA segment that happens between two pairing chromosomes, that is, they exchange sections of their DNA.

• Homologous chromosomes unite in pairs and exchange their genetic information during the germ line.

• It is very important since it is a phenomenon that contributes to genetic variation, natural selection and adaptation to environmental changes.

Therefore, we can conclude that pairs of homologous chromosomes exchange segments of their DNA is the phrase that best describes the process of crossing over.

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