Nerodia sipedon insularum is a species of the Northern Water Snake that lives on islands in the western part of Lake Erie. This snake exhibits polymorphism (many color forms) and can be described as Banded (BB), intermediate (Bb) and unbanded (bb).  The mainland populations of this snake are all banded.  The islands have sandy shores which the snakes reside compared to rocky shores of the mainland.  In 1980-1984, Richard King conducted a study of mark recapture to look at the numbers of each of these morphs of snakes and for the Island of Pelee this was the population size:  Banded:  71 individuals; Intermediate:  80 individuals; Unbanded 20 individuals.  Give the genotypic frequencies for each morph and then give the allele frequencies for this population.

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.