At Least One of These Has Been Found in All

Question

At least one of these has been found in all species of eumetazoan animals studied thus far.
A) Hox
B) Dlx
C) Otx
D) FOXP2
E) more than one of these

Accepted Answer

Hox genes are a group of related genes that control the body plan of an embryo along the head-tail axis and have been found in all eumetazoan animals studied.