Shell color in crabs is determined by a polygenic inheritance system, possibly involving involving as many as 9 genes. For simplicity let’s consider the influence of 3 genes: A, B and C, where a dominant

Shell color in crabs is determined by a polygenic inheritance system, possibly involving involving as many as 9 genes. For simplicity let’s consider the influence of 3 genes: A, B and C, where a dominant allele darkens shell color .

Crab A: aaAAaaABaABC

Crab D: aaaaAAaaBaaa

Crab B: aaAAaaBaCaaa

Crab C:aaAAaaaaaaaa

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Shell color in crabs is determined by a polygenic inheritance system, possibly involving involving as many as 9 genes. For simplicity let’s consider the influence of 3 genes: A,…

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