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Abyssinian guinea pigs have a rosette (long and bushy) coat that is controlled by a dominant gene. A short and smooth coat is recessive to the rosette allele. A breeder conducts a testcross to see if his Abyssinian guinea pig is homozygous or heterozygous. If the pig is homozygous, what is the phenotypic ratio in the offspring?

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100% Rosetta coats is the correct answer.
User Cory Brunson
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