In shorthorn cattle coat color may be red white or, Ask an Expert

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In shorthorn cattle, coat color may be red, white, or roan.Roan is an intermediate phenotype expressed as a mixture of red and white hairs. The following data was obtained from various crosses:

red x red.........all red
white x white....all white
red x white........all roan
roan x roan.......1/4 red; 1/2roan;1/4 white

How is coat color inherited? What are the genotypes of parents and offspring of each cross?

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