CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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meiosis, which reduces the chromosome number of the gamete by one half
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chromosomes being copied immediately after fertilization of the gametes
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mitosis, which maintains the number of chromosomes in the daughter cells
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half of the chromosomes being destroyed immediately after fertilization of the gametes.
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Detailed explanation-1: -We can think of meiosis as a way cells very carefully count and divide their chromosomes so that each gamete, each egg or sperm, has exactly 23 chromosomes. Then when an egg with its 23 chromosomes is fertilized by a sperm with its 23 chromosomes, the resulting fertilized egg has exactly 46 chromosomes.
Detailed explanation-2: -Meiosis is the process through which sexually reproducing organisms maintain their particular chromosomal numbers from generation to generation. In humans, meiosis generates sperm and eggs, each having 23 chromosomes. By fertilizing sperm and ova, the chromosome number is restored in the zygote (46 chromosomes).
Detailed explanation-3: -There are two divisions in meiosis; the first division is meiosis I: the number of cells is doubled but the number of chromosomes is not. This results in 1/2 as many chromosomes per cell. The second division is meiosis II: this division is like mitosis; the number of chromosomes does not get reduced.
Detailed explanation-4: -Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells.
Detailed explanation-5: -The gametes are formed by meiosis during which the number of chromosomes are reduced to half, i.e. gametes contain haploid number of chromosomes. The male and female gametes fuse to form a zygote. In this way, meiosis maintains a chromosome number in species.