HEREDITY
THE PEDIGREE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If a female has a sex-linked trait ____
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her father must have it and her mother must be a carrier
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her mother must have it and her father must be a carrier
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her sister must have it and her brother must be a carrier
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her grandfather must have it and her grandmother must be a carrier
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Explanation:
Detailed explanation-1: -If only the father or the mother has the mutated X-linked gene, the daughters are usually not affected and are called carriers because one of their X chromosomes has the mutation but the other one is normal. Sons will be affected if they inherit the mutated X-linked gene from their mother.
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