CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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39 chromosomes
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46 chromosomes
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78 chromosomes
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184 chromosomes
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Detailed explanation-1: -Mitosis causes the number of chromosomes to double to 92, and then split in half back to 46. This process repeats constantly in the cells as the baby grows. Mitosis continues throughout your lifetime. It replaces skin cells, blood cells, and other types of cells that are damaged or naturally die.
Detailed explanation-2: -Each chromosome thus consists of two sister chromatids. At the beginning of meiosis I, a human cell contains 46 chromosomes, or 92 chromatids (the same number as during mitosis).
Detailed explanation-3: -A meiocyte is diploid which undergoes meiosis to form haploid gametes. Gametes in turn fuse to form the diploid zygote. So the zygote of the dog will have the same number of the chromosomes as the meiocytes ie., 78.
Detailed explanation-4: -After meiosis II, when each parent cell gets divided into two gametes each gamete cell contains 23 chromosomes. In this phase, each gamete remains haploid in nature. At the end of meiosis II, each cell will have the half number of the actual chromosome i.e. 23 chromosomes.