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QUESTION 18 Identify the pattern of inheritance in this pedigree: autosomal dominant O autosomal recessive O X-linked dominan
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Answer #1

Answer:

Autosomal recessive

Explanation:

Black dots in either circle or square indicates carrier. There would be no carriers in autosomal or x-linked dominant type of inheritance. So, the inheritance is neither autosomal dominant nor X-linked dominant. In X-linked recessive inheritance, all the male descendants of affected female would have affected but not in this (first generation todants of affected female would have affected but not in this (first generation to second generation). Hence, it is not X-linked recessive type of inheritance. Therefore, it is autosomal recessive type of inheritance.

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