PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How do the chromosomes in a sex cell differ from those in a body cell?
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A sex cell has half the number of chromosomes as a body cell
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A sex cell has twice the number of chromosomes as a body cell
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A sex cell has chromosomes that are half as long as those in a body cell
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A sex cell has chromosomes that twice as long as those in a body cell
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Explanation:
Detailed explanation-1: -Sex cells are different from other cells in one special way: Put simply, they only have one half of the total amount of human genetic information. When a sperm cell fertilizes an egg cell, the resulting cell has a full set of genetic information again.
Detailed explanation-2: -Gametes are reproductive cells, such as sperm and egg. As gametes are produced, the number of chromosomes must be reduced by half. Why? The zygote must contain genetic information from the mother and from the father, so the gametes must contain half of the chromosomes found in normal body cells.
Detailed explanation-3: -Gamete is the name given to the reproductive cells with half the initial body’s chromosomes.
There is 1 question to complete.