Question 35 2 pts A phenotypically normal woman marries a man with Wilson diseas

Question

Question 35 2 pts A phenotypically normal woman marries a man with Wilson disease, a autosomal recessive disorder. They have a son who has Wilson disease. If you need two copies of the recessive allele to be affected and the mother doesn't have the disease, how did the son get it? O The woman had two recessive alleles. The woman must have been a carrier of one recessive allele and one normal allele - The woman had two dominant alleles. O The man had two dominant alleles The man had one dominant and one recessive allele. 4 Previous

Explanation / Answer

Answer. The woman has been the carrier of one recessive allele and one normal allele.

Autosomal recessive trait in affected females is shown by 2 recessive alleles and in males by one recessive allele.

In this case, the genetic cross can be observed as:

Female- XXw Male- XwY

F1 offsprings: XXw- Carrier female

XY- Normal male

XwXw- Affected daughter with Wilson disease

XwY-Affected son, he has acquired recessive gene from his mother who is Heterozygous for the trait.

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