Question

414 2 Ar AWA MA Aa Aa AA AA Ao A A AM

Can someone please help me determine if this is autosomal dominant, autosomal recessive, x-linked recessive or x-linked dominant?
I think its autosomal dominant but correct me if I'm wrong.

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Answer #1

It is "autosomal dominant".

​​​​​​The affected phenotype is NOT skipping the generations, and no offsprings are affected if parents are normal. Therefore, it indicates that the allele causing the particular conditions is dominant.

​​​X-link inheritance is not possible because affected father is able to transfer the particular condition to his son and daughter as well. A father can only transfer "Y" chromosome to his son ("X" chromosome comes from mother),

​​​​​​Thus, the only possibility remains is autosomal dominant as a father transfer autosomal alleles to both sons and daughters.

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