A) Autosomal dominant
B) X-linked recessive
C) Autosomal recessive.
D) X-linked dominant
Correct Answer: B
Solution :
The given pedigree shows the autosomal recessive disorder. In this disorder, the individual inherit two mutated genes, one from each parent. This disorder is usually passed on by two carriers. Health is rarely affected, but individual have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition. The carriers have a 25% chance of having an unaffected child with normal genes, 50% chance of having an unaffected child who also is a carrier and a 25% chance of having an affected child with recessive genes.
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