Living Environment Regents Practice Test

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What causes the color variations observed in lobsters?

Environmental conditions
Genetic variations
Dietary factors
Parasites

The correct answer is: Genetic variations

The color variations observed in lobsters primarily stem from genetic variations. Different lobsters inherit various alleles that influence the production of pigments in their shells. These genetic differences account for the range of colors seen in lobsters, such as blue, yellow, and orange, among others. While environmental conditions like temperature and habitat can influence the expression of some traits, it is the underlying genetics that determines the potential color a lobster can exhibit. Dietary factors may also play a role by affecting the pigments that lobsters can incorporate into their shells, but these are secondary to the genetic blueprint that regulates color in the first place. Parasites typically impact health or behavior, but do not directly contribute to the inherent color variations in lobsters.