Asked by Pipit
Labrador retriever come in three main colors: yellow, black, and chocolate brown. The black color is dominant (BB), Yellow (ee) and brown (bb) are both recessive. However, yellow is recessive epistatic. This means thata yellow will mask both brown and black colors. Based on this information, what color will a labrador be if the genotype is (BBee)? Explain.
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Answered by
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The lab will be yellow.
Why: ee is recessive epistatic — when the dog is ee it prevents expression of the B/b pigment gene. Even though BB would normally give black, the ee genotype masks the B/b locus, so no black or brown pigment is produced and the coat is yellow.
Why: ee is recessive epistatic — when the dog is ee it prevents expression of the B/b pigment gene. Even though BB would normally give black, the ee genotype masks the B/b locus, so no black or brown pigment is produced and the coat is yellow.
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