3. Extensions to Mendelian Inheritance
Variations of Dominance
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13PRACTICE PROBLEM
In cattles, the polled (absence of horn) condition is dominant over horned, and the coat color is controlled by two codominant alleles. The genotype RR produces red coat color, RW produces roan, and WW produces white. A dairy farmer crossed polled roan bulls with polled white cows on his farm, and the following offspring were produced:
Determine the genotype of the bulls and the cows used by the dairy farmer for crossing.
In cattles, the polled (absence of horn) condition is dominant over horned, and the coat color is controlled by two codominant alleles. The genotype RR produces red coat color, RW produces roan, and WW produces white. A dairy farmer crossed polled roan bulls with polled white cows on his farm, and the following offspring were produced:
Determine the genotype of the bulls and the cows used by the dairy farmer for crossing.