In autosomal dominant inheritance with full penetrance, what is the probability a child will be affected if one parent is heterozygous (Aa) and the other is homozygous normal (aa)?
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Correct answer: 50%
In autosomal dominant inheritance, a heterozygous parent (Aa) crossed with a homozygous normal parent (aa) gives each child a 50% chance of inheriting the mutant allele and being affected.
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