Question

the pedigree below tracks the presence of dimples through a family’s generation. having dimples is an autosomal dominant trait.
what is the phenotype of individual iii-4?
○ a female without dimples
○ b male with dimples
○ c dd
○ d dd

Explanation:

1. First, analyze the pedigree symbols: squares represent males, circles represent females. Filled symbols mean the trait (dimples, autosomal dominant) is present.
2. Individual III - 4 is a square (male), and the square is filled, so the phenotype is male with dimples. Option a is female (incorrect, as it's a square). Options c and d are genotypes, but the question asks for phenotype.

Answer:

B. male with dimples