EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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chromosome replication during mitosis
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crossing-over during meiosis
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neutral mutation during transcription
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genetic drift during reproduction
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Detailed explanation-1: -Normal crossing-over, or recombination, can occur between equivalent sequences on homologous chromatids present in a synaptonemal complex that forms during the pachytene stage of meiosis in both male and female mammals.
Detailed explanation-2: -Crossing Over in Meiosis A tetrad is composed of four chromatids. As the two sister chromatids are aligned in close proximity to one another, one chromatid from the maternal chromosome can cross positions with a chromatid from the paternal chromosome. These crossed chromatids are called a chiasma.
Detailed explanation-3: -Crossing Over This process results in new combinations of alleles in the gametes (egg or sperm) formed, which ensures genomic variation in any offspring produced.
Detailed explanation-4: -/ˈdu·plɪ·kət/ something that is an exact copy of something else: I lost the original form so they sent me a duplicate.
Detailed explanation-5: -Two sources of genetic diversity in meiosis are independent assortment and crossing over. Independent assortment of homologous chromosomes occur during metaphase of meiosis I.