When a red shorthorn cow is crossed with a white bull, the offspring carry a mixture of red and white hairs called roan. This illustrates
- A. complete dominance
- B. linkage
- C. crossing over
- D. codominance
Explanation
Both alleles express themselves side by side in the heterozygote, producing distinct red and white hairs rather than a blended colour. In incomplete dominance, by contrast, the phenotype is an intermediate such as pink.
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