Genetics question: An X-linked dominant allele causes hypophosphatemia in humans. A man with hypophosphatemia marries a...
Genetics question: An X-linked dominant allele causes hypophosphatemia in humans. A man with hypophosphatemia marries a normal woman. What proportion of their sons will have hypophosphatemia? Please show work. Thank you!
Homework Answers
Answer - None of their sons will have hypophosphatemia .
Explanation
Man with hypophosphatemia will have genetic makeup XH Y
Normal woman will have makeup as XX
Sons will have XY .
Since the Y chromosome of man have combined with X chromosome of woman to give rise to zygote of boys, the gene for hypophosphatemia was not inherited by boys.
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