The picture shown here is pedigree chart for a family, some of whose members exhibit the dominant trait, a widow's peak. Individuals with a widow's peak are indicated by a filled square or circle. Individuals with a straight hairline are indicated by an empty square or circle. What is the probability that individual III-1 has a genotype of Ww? Explain your answer. 1 2 I Ww 2 3 4 5 6 7 II III 2 3 IV 8.

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