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Question

If both parents are carriers for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

A
50%
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B
25%
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C
100%
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D
No chance
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Solution

The correct option is C 25%
Thalassemia is a hereditary disorder. The disease is passed to the child from the parents who carry the mutated thalassemia gene. A child who inherits one mutated gene is known as a carrier. When both parents are carriers of the autosomal recessive gene, then the possibility of the offspring being
affected is 25% that is 1 in 4.
Thus, the correct answer is option B.

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