Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The structural organization of the Hox clusters. Drosophila has a single set of Hox genes termed the Homeotic complex, which is made up of two clusters, the Antennapedia and the Bithorax complexes. Vertebrates have four sets of Hox clusters generated by two rounds of polyploidization events that occurred prior to the divergence of jawless and jawed vertebrates.
