In Humans, Ability to Roll the Tongue (R) Is Dominant

question 31

Multiple Choice

In humans, ability to roll the tongue (R) is dominant to being unable to roll (r) . Having freckles (F) is dominant to having no freckles (f) . A man heterozygous for both traits marries a woman heterozygous for both traits. What is the probability that they will have a child with freckles?

• A)9/16
• B)3/16
• C)1/16
• D)³/₄
• E)¹/₄

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