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.
Phylogenetic tree of sheep and related animals. generated using single‐copy orthologous genes. Origins (black) and amplificationgenes (red). Scale is in millions of years ago (Mya). Blue numbers on the nodes are calculated divergence times from present (Mya) and its confidence interval. Figure reproduced from 93 under Open Access
