Labrador retrievers may have yellow fur, chocolate brown fur, or black fur. Coat color is determined by two genes that have two alleles each. One gene, called E, determines whether the dog’s fur is dark or light, with the dark allele (E) dominant to the light allele (e). The other gene, called B, determines whether the dark fur will be black or chocolate, with the black allele (B) dominant to the chocolate allele (b). If you mate two chocolate labs together, what color puppies can they have?

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    Chocolate or yellow puppies can be produced, because the parents can be either Eebb or EEbb.
    Chocolate and black puppies will be produced, because both parents must be EeBb.
    Only chocolate puppies can be produced, because both parents must be EEbb.
    Chocolate, yellow, and black puppies will be produced, because both parents must be EeBb.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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Chocolate or yellow puppies can be produced, because the parents can be either Eebb or EEbb.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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