Beak Shape Difference in Galapagos Finches Was One of the Earliest

question 13

Multiple Choice

Beak shape difference in Galapagos finches was one of the earliest observations supporting evolutionary theory. The recent identification of ALX1 as the likely gene responsible for these differences was the culmination of a research history that has drawn on several of the Great Ideas in biology. Match each Great Idea to the relevant evidence underlying the discovery of ALX1.
-The cell as the basic unit of living systems

• A) Development of beak shape as a consequence of localized gene expression
• B) Identification of candidate genes for influencing beak shape
• C) Changes in DNA sequence influence phenotype
• D) Observed differences in beak shape

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