LABORATORY REVIEW
MITOSIS AND MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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crossing over
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independent assortment
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random fertilization
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gene flow
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Detailed explanation-1: -Crossing-Over. Crossing-over occurs during prophase I, and it is the exchange of genetic material between non-sister chromatids of homologous chromosomes.
Detailed explanation-2: -Definition. Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).
Detailed explanation-3: -Exchange of segments between non sister chromatids of homologous chromosomes is called crossing over. It occurs during pachytene stage of prophase I in meiosis.
Detailed explanation-4: -In synapsis, the genes on the chromatids of the homologous chromosomes are aligned with each other. The synaptonemal complex also supports the exchange of chromosomal segments between non-sister homologous chromatids in a process called crossing over.