Question

Taking into account both the odds of allele inheritance and carrier risk, what are the odds that she and her partner will have an affected child if he is of Northern European descent and unknown CF carrier status?
a) 50%
b) 3.5%
c) 1.8%
d) 0%

Answer 1

Answer:

Option a (50%) is the correct answer.

Explanation:

• The autosomal disease does seem to be cystic fibrosis that causes the CFTR gene genetic defect. Throughout this situation, a woman, as well as a male, had already significantly impacted the child.
• Two very different parents seem to be strange alleles, which appears to mean that it would be Aa that would be heterozygous recessive. Therefore it's there's one in every biological parent again for an afflicted child throughout conception.

Other choices are not related to the given scenario. Thus, for only one of every parent, 50% of Aa.

Answer 2

The correct answer is a)
50%