Fig. 1.
Phylogenetic tree of nucleotide sequences. (A) Y chromosome. (B) Autosomes. Branch lengths (substitutions per 100 sites) were estimated from multispecies alignment blocks including all five species.
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.