1·The coat color of Labrador retrievers is coded by at least two loci: B and E.

Question

1·The coat color of Labrador retrievers is coded by at least two loci: B and E. Brown dogs are homozygous bb and have at least one E allele. Yellow dogs are a result of the presence of ee. Black Labradors must have at least one E and one B. When a yellow fe- male Labrador retriever was mated with a brown male, half of the puppies were brown and mated with a different brown male, produced only Brown off- spring. Explain these results by giving the genotypes of the female dog, and the two male dogs. half were yellow. The same female, when (

Explanation / Answer

yellow female dog x brown male dog......................bbee x bbEE....100% brown offspring

be be bE bbEe (brown) bbEe(brown) be bbee (yellow) bbee(yellow)

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