Suppose That an F₁ Dihybrid Cross Results in a Phenotypic

question 6

Multiple Choice

Suppose that an F₁ dihybrid cross results in a phenotypic ratio of 9:3:4. What does this tell you?

• A) The second locus is dominant over the first locus.
• B) Dominance is incomplete at the second locus.
• C) Epistasis is occurring.
• D) Codominance is at the second locus.

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