HEREDITY
THE PEDIGREE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A boy is born with an extra finger on one hand. Extra digits are known to be common in members of the father’s (and the father has 6 fingers as well) extended family, but not the mother’s. The boy’s two sisters have normal fingers. What is the most likely explanation?
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X-linked inheritance, since only males are affected.
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Y-linked inheritance:Males inherit from their fathers.
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The extra finger trait is autosomal dominant.
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A spontaneous mutation occurred.
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Explanation:
Detailed explanation-1: -boy is born with an extra finger ‘ 0n one hand Extra digits are known to be common in members of the father’s extended family but not the mothers. The boy’s two sisters have normal fingers. What is the most likely explanation? X-linked inheritance, since only males are affected.
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