Produced red and white progeny at a frequency

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Holstein cattle are normally black and white. A superb black and white bull, Nick, was purchased by a farmer for $100 000. The progeny sired by Nick were all normal in appearance. However, certain pairs of his progeny, when interbred, produced red and white progeny at a frequency of about 25 percent. Nick was soon removed from the stud lists of the Holstein breeders. Explain why, using symbols.

Reference no: EM1340349

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