African cichlid fish are beautiful, easy to breed, and many different species can be ordered on Ebay.

In one specious, Metriaclima gigantus, the wild type has dark body coloration with light blue stripes (see photo). You have two different single gene mutants of Metriaclima gigantus where one mutant has a dark body with no stripes and the other has a light body with blue stripes.

You cross these two mutants and obtain 48 of spring with the following phenotypes : 5 .

27 wild type fish 9 with dark bodies and no stripes 9 with light bodies and blue stripes 3 with light bodies and no stripes

What does this finding tell you about the underlying molecular biology of the pigmentation phenotype in M. gigantus?

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