The Engrailed (En) Gene Is an Example of A(n)

Multiple Choice

The Engrailed (En) gene is an example of a(n)

A) paralog; it is crucial for defining the posterior portion of the limb bud in mice and for defining the leg disc in flies.
B) ortholog; it is crucial for defining the posterior portion of the limb bud in mice and for defining the leg disc in flies.
C) paralog; it is a homologous gene produced by gene duplication within the fly limb development pathway.
D) ortholog; it is a homologous gene produced by gene duplication within the fly limb development pathway.