Explain the effect of cumulative genes on ski | vedclass

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(B) According to Davenport,human skin color is determined by polygenic inheritance. In polygenic traits,the phenotype is determined by the cumulative

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It is an example of polygenic inheritance where each allele contributes to the phenotype.

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(B) According to Davenport,human skin color is determined by polygenic inheritance. In polygenic traits,the phenotype is determined by the cumulative effect of each allele.Let us assume that three genes $A, B,$ and $C$ control skin color. The dominant alleles $A, B,$ and $C$ are responsible for dark skin pigmentation,while the recessive alleles $a, b,$ and $c$ are responsible for light skin pigmentation.$A$ genotype with all dominant alleles $(AABBCC)$ results in the darkest skin color. Conversely,a genotype with all recessive alleles $(aabbcc)$ results in the lightest skin color. Each dominant allele adds a unit of pigment,demonstrating the cumulative effect.

Explain the effect of cumulative genes on skin color.

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