The trait for red hair is recessive, meaning that when a person expresses two copies of this allele they have red hair. what can be said about the phenotype and genotype of a red-haired individual versus a brown-haired (dominant) individual?

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Biology

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8 September, 03:26

The trait for red hair is recessive, meaning that when a person expresses two copies of this allele they have red hair. what can be said about the phenotype and genotype of a red-haired individual versus a brown-haired (dominant) individual?

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Whitie · Answer 1

Let "r" stand for the recessive red hair trait. A person with red hair must have a genotype of "rr" (one from each parent) in order to have red hair (red hair being the phenotype).

Let "B" stand for brown hair and "b" stand for not brown hair. A person with brown hair can have a genotype of "Bb" or "BB" and have a phenotype of Brown hair. This is becasue brown hair "B" is the dominant trait.