Imagine That Beak Color in a Finch Species Is Controlled

question 30

Multiple Choice

Imagine that beak color in a finch species is controlled by a single gene. You mate a finch homozygous for orange (pigmented) beak with a finch homozygous for ivory (unpigmented) beak and get numerous offspring, all of which have a pale, ivory-orange beak. This pattern of color expression is most likely to be an example of

• A) incomplete dominance.
• B) codominance.
• C) pleiotropy.
• D) polygenic inheritance.

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