What Evidence Supported the Hypothesis That Differences in the ALX1

Multiple Choice

What evidence supported the hypothesis that differences in the ALX1 gene were responsible for beak differences in Darwin's finches? Please select all that apply.

A) ALX1 was found in all the finch DNA sequences
B) ALX1 was expressed at the expected time and location for a gene involved in beak development.
C) ALX1 lay in a region of the genome that correlated with a difference in beak shapes
D) Mammals with defects in ALX1 have facial abnormalities