A sex-influenced trait is dominant in bulls and causes horns. The same trait is recessive in cows and results in no horns.   Fur color is not sex influenced, with black fur dominant to cream. A true breeding female with horns and black fur was crossed to a cream-colored male without horns. The F1 females were then crossed to hornless cream-colored males. The following results were obtained: Males: 30 hornless, black 68 hornless, cream-colored 74 horns, black 26 horns, cream-colored   Females: 109 hornless, black 91   hornless, cream-colored 0     horns, black 0     horns, cream-colored   Construct a chi square analysis to see if the genes are linked. If the genes are linked, compute the map distance between them.

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