Aman has a pointed frontal hairline known as a widow's peak. this trait is thought to be controlled by a dominant allele. his wife lacks a widow's peak, and their son has a widow's peak. (w: widow's peak; w: no widow's peak). the son is curious about whether his father is homozygous or heterozygous for the widow's peak trait. which of the following facts would allow him to know? a. his father's mother lacks a widow's peak.
b. both his paternal grandfather and his paternal grandmother have widow's peaks.
c. the son's sister has a widow's peak.
d. the son's own daughter lacks a widow's peak.
e. the son submits his own blood sample to a local genotyping lab, and it establishes that he is heterozygous for the trait.
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Aman has a pointed frontal hairline known as a widow's peak. this trait is thought to be controlled...
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