Concept
Version 8
Created by Boundless
Animal Reproduction and Development
Hox genes
Hox genes are highly-conserved genes encoding transcription factors that determine the course of embryonic development in animals. In vertebrates, the genes have been duplicated into four clusters: Hox-A, Hox-B, Hox-C, and Hox-D. Genes within these clusters are expressed in certain body segments at certain stages of development. Shown here is the homology between Hox genes in mice and humans. Note how Hox gene expression, as indicated with orange, pink, blue, and green shading, occurs in the same body segments in both the mouse and the human.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Features of the Animal Kingdom. October 17, 2013."
http://cnx.org/content/m44655/latest/Figure_27_01_04.png
OpenStax CNX
CC BY 3.0.