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.
Arrows indicate mono-, tri-, and tetrasomic chromosomes belonging to different genomes: red arrows – B genome; blue – A; and green – S.
