In cattle, coat colour shows codominance. A farmer in Guyana crosses a red bull (CRCR) with a white cow (CWCW). What phenotype will the F1 offspring display?

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Question

In cattle, coat colour shows codominance. A farmer in Guyana crosses a red bull (CRCR) with a white cow (CWCW). What phenotype will the F1 offspring display?

Accepted Answer

Red and white patches (roan) — Award 1 mark for identifying roan phenotype. In codominance, both alleles are equally expressed, so CRCW individuals show both red and white hairs, creating a roan appearance. A and B are incorrect because neither allele is dominant. C is incorrect because pink represents incomplete dominance (blending), not codominance where both colours appear distinctly.

Answer

All pink

Answer

Red and white patches (roan)

Answer

All white

Answer

All red

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