The Entire DNA Sequence of an Organism Can Be Determined

Multiple Choice

The entire DNA sequence of an organism can be determined, and different organisms have many differences in sequence between them. (There are many differences even between members of the same species.) What would be the best way for geneticists to find out which DNA regions were important for a particular trait difference - for example, beak shape in Darwin's finches?

A) Identify the species that had most overall differences between the sequences.
B) Compare the sequences of finches with sequences of other birds.
C) Compare sequences between different finch species with different beak shapes.
D) Compare sequences between members of the same species with different beak shape.