OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What happens in crossing over?
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Exchange of genetic material between homologous chromosomes
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Exchange of genes during metaphase of mitosis
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Random distribution of chromosomes during meiosis
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Homologous chromosomes fail to separate during meiosis
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Explanation:
Detailed explanation-1: -Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up. When two chromosomes-one from the mother and one from the father-line up, parts of the chromosome can be switched. The two chromosomes contain the same genes, but may have different forms of the genes.
Detailed explanation-2: -Exchange of segments between non sister chromatids of homologous chromosomes is called crossing over. It occurs during pachytene stage of prophase I in meiosis.
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