If a widow's peak hairline is dominant and a straight hairline is recessive, then
A. some of the children of two straight-hairline parents could have widow's peaks.
B. some of the children of two widow-peaked parents will have straight hairlines.
C. all the children of two widow-peaked parents will have widow's peaks.
D. all the children of two straight-hairline parents will have straight hairlines.
Answer: D
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