In a family of two blacks a child appeared brighter than his parents. explain this fact from a genetic point

In a family of two blacks a child appeared brighter than his parents. explain this fact from a genetic point of view, if it is known that skin color is determined by the interaction of several pairs of genes by the type of cumulative polymer.

Apparently, both parents were heterozygous for skin color, and when the gametes merged, a recessive genotype for this trait was formed: with lighter skin.



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