In human beings, a downwaed frontal hairline (widow's peak) is a heritable trait. A person with a widow's peak always has at least one parent who also has this trait, whereas persons with straight frontal hairline may occur in families in which one or even both parents have widow's peak. When both parents have a straight frontal hairline, all children also have straight frontal hairline. Using H and h to symbolize the genes for this trait, what is the genotype of an individual without widow's peak?
a. Parental Gametes
b. Parental Genotype (Monohybrid Cross)
c. Genotypic Ratio of Offspring
d. Phenotypic Ratio of Offspring
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A dominant allele will mask a recessive allele, if present. ... AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait. One example of a dominantly inherited trait is the presence of a widow's peak ... with a (WW) or (Ww) genotype will have a V-shaped peak at the hairline.
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