18. The pedigree below charts the inheritance of an autosomal recessive trait in a family. If individuals A and B mated, what is the probability that they would have a child that exhibited the trait? A. 1/12 B. 1/6 C. 1/8 D. 1/16 E. none of the above
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Based on the pedigree, we can see that individual A is affected by the trait, so their genotype must be homozygous recessive (aa). Individual B is unaffected, so their genotype could be either homozygous dominant (AA) or heterozygous (Aa). Show more…
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The following pedigree shows the inheritance of a recessive trait. Unless there is evidence to the contrary, assume that the individuals who have married into the family do not carry the recessive allele. What is the chance that the offspring of III-1 and III-12 will show the trait? a) 1/32 b) 1/4 c) 1/8 d) 1/64 e) 1/16
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