What did researchers discover about the genetic mutation causing the loss of pelvic spines?
Select all that apply.
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It is found in a regulatory region (a “switch”) upstream of the coding region of the Pitx1 gene

It is found in the coding region of the Pitx1 gene.

It results in a protein that is no longer functional.

It occurred in a similar DNA region in freshwater stickleback populations all over the world.