Which statements describe crossing over? increases genetic variation across gametes occurs between homologous chromosomes separates chromosome pairs into gametes occurs between duplicated sister chromatids

Question

Biology

Vasquez

16 May, 10:46

Which statements describe crossing over? increases genetic variation across gametes occurs between homologous chromosomes separates chromosome pairs into gametes occurs between duplicated sister chromatids

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Answers (1)

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Aliana Blanchard · Answer 1

increases genetic variation across gametes

occurs between homologous chromosomes

Explanation:

Crossing over is the exchange of chromosomal segments between homologous chromosomes during prophase I of meiosis. The process occur after the formation of bivalents/tetrads as a result of synapsed homologous chromosomes.

The exchange of chromosomal segments ensures that resulting meiotic gametes are genetically different from their parents, a phenomenon known as genetic variation.

Hence, the two statements out of the options that describe crossing over are:

increases genetic variation across gametes occurs between homologous chromosomes