ANIMAL REPRODUCTION AND DEVELOPMENT
SEXUAL REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What percentage of chromosomes are handed down by the male’s cell?
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75%
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25%
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50%
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100%
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Explanation:
Detailed explanation-1: -What percentage of chromosomes are handed down by a sperm cell? A)75%.
Detailed explanation-2: -After all, children inherit half of their DNA from each parent: 50 percent from mom (through an egg), and 50 percent from dad (through sperm).
Detailed explanation-3: -Autosomal dominant inheritance: A person affected by an autosomal dominant disorder has a 50 percent chance of passing the altered gene to each child.
Detailed explanation-4: -In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
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