Question #6424236Single Choice
Biology
Question
In a pedigree for an autosomal recessive trait, two unaffected parents (I-1 and I-2) have two unaffected children (II-1 and II-3) and one affected child (II-2).
What is the probability that an unaffected sibling (II-1 or II-3) is a carrier?
Options
A
0%
B
25%
C
50%
D
67%
Answer & Analysis
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