Certain kinds of cattle have two alleles for coat color: R = red, and r = white. when an cow is heterozygous, it is spotted with red and white (roan). When two red alleles are present, it is red. When two white alleles are present it is white. The allele L, for lack of horns, is dominant over l, for presence of horns. If a bull and a cow both have the genotype RrLl, how many possible phenotypes of offspring can they have?
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