CELL DIVISION
THE CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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40
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23
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20
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Detailed explanation-1: -The haploid cells contain half the number of chromosomes as the diploid cells. Thus, if a diploid cell contains 40 chromosomes, then the haploid cell will contain 20 chromosomes. During meiosis, a diploid cell undergoes two successive rounds of cell division to form four haploid cells.
Detailed explanation-2: -Thus if the chromosome number in a diploid zygote is 40, then it means the diploid organism has 40 chromosomes in total and this will reduce to its half at the time of gamete formation through meiosis. Therefore, the chromosome number in a gamete will be 20.
Detailed explanation-3: -The diploid number can be calculated by multiplying the haploid number by 2. The variable ‘N’ represents the number of chromosomes in the genome. Thus, the haploid number of chromosomes is equal to N. The diploid number of chromosomes is equal to 2N.
Detailed explanation-4: -In this example, a diploid body cell contains 2n = 4 chromosomes, 2 from mom and two from dad. In humans, 2n = 46, and n = 23.