Dark brown
are BB for dan
population of crabs living on a sandy beach exhibits three colors: dark
brown, and speckled, as shown below. The genotypes for these colors are
prown, bb for light brown, and Bb for speckled. The speckled color blends
extremely well with the color of the sand on the beach. The pattern appears
provide the speckled crabs with some protection from predatory birds.
the beach. The patilor blends in Pro
PHENOTYPES AND GENOTYPES OF CRABS
Speckled (Bb)
Dark Brown (BB)
Light Brown (bb)