CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The daughter cells are genetically identical to the parent cells.
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Homologous chromosomes pair during prophase II.
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DNA replication occurs before meiosis I and meiosis II.
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The number of chromosomes is reduced.
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Sister chromatids line up during metaphase I.
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Detailed explanation-1: -So, the correct answer is ‘Meiosis produces gametes that contain one complete haploid set of chromosomes’
Detailed explanation-2: -The reduction of chromosome number in meiosis is a central event in the lives of most eukaryotes, including humans. It makes diploidy possible because the gametes that are produced with half the chromosome number of their parent cells can then fuse to form a diploid zygote.
Detailed explanation-3: -Meiosis is sometimes called “reduction division” because it reduces the number of chromosomes to half the normal number so that, when fusion of sperm and egg occurs, baby will have the correct number.
Detailed explanation-4: -Assertion: During meiotic cell division, the chromosome content of the daughter cells is halved by the end of meiosis I itself.
Detailed explanation-5: -One purpose of meiosis is to reduce the number of chromosomes by half. The other is to create genetic diversity. Meiosis begins like mitosis: the cell copies each chromosome. But unlike in mitosis, homologous chromosome pairs line up and exchange pieces-a process called recombination.