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Home Q & A Board Biology-Related Homework Help General Biology
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Ojs123 Ojs123
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6 years ago
Two phenotypically normal parents have six children. Two daughters and two sons have the same
  genetic disease. This would be the expected situation for
  A. hemophilia.
  B. cystic fibrosis.
  C. Marfan syndrome.
  D. hypophosphatemia.
  E. all of these.

Question 2

A child is born with a lethal dominant allele. This would seem to be impossible since either parent,
  had they possessed this allele, would have suffered its lethal effects. What is a possible explanation?
  A. The child's allele is a spontaneous mutation that neither parent had to deal with.
  B. The allele could have varying expressivity and not always be lethal.
  C. The allele could have delayed onset.
  D. All of these are possible.
  E. None of these is possible.
Textbook 
Human Heredity: Principles and Issues

Human Heredity: Principles and Issues


Edition: 10th
Author:
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kzabeckzabec
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Ojs123 Author
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#2
6 years ago
Thank you

Can you answer the others that I've posted too? Face with Cold Sweat
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#3
6 years ago
I'll take a quick look at them
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