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Many ranchers prefer cattle without horns. The
presence or absence of horns is genetically determined.
The allele for the absence of horns (A) is dominant to
the allele for the presence of horns (a).

A male with horns is mated with a heterozygous female
without horns. What percentage of the offspring would
be expected to have horns? (1 point)

A. 25%

B. 50%

C. 75%

D. 100%

Sagot :

Well, that is 50%. Just do all 4 cases and you find that in 2 of them you get horns.
50%. You would set up a punnett square and find that the female would pass the dominant allele to 2 of 4 offspring.
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