Question #6424239Single Choice

Biology

Question

An autosomal dominant trait is tracked. An affected parent (I-1) and an unaffected parent (I-2) have four children: two are affected (II-1 and II-2), and two are unaffected (II-3 and II-4).

What is the most likely genotype of the affected parent (I-1)?

Options

AA (homozygous dominant)

Aa (heterozygous)

aa (homozygous recessive)

It cannot be determined.

Answer & Analysis

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