What is the phenotypic ratio observed in a dihybrid cross with recessive epistasis?

• 9:3:4

• 9:3:3:1

• 12:3:1

• 15:1

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Remembering

Explain how recessive epistasis affects the phenotypic expression in Labrador Retrievers.

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Understanding

In the context of gene interactions, the term 'epistasis' means ___.

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Remembering

Discuss the biological interpretation of dominant epistasis in squash plants.

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Evaluating

Which genotype in Labrador Retrievers is epistatic to the B/b locus?

• ee

• BB

• Bb

• bb

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Remembering

In a dihybrid cross showing dominant epistasis, what is the phenotypic ratio?

• 12:3:1

• 9:3:4

• 9:7

• 15:1

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Remembering

The dominant allele at one locus that masks the phenotype of a second locus is an example of ___ epistasis.

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Remembering