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.
Squares represent males, circles represent females, single horizontal lines connecting square and circle indicate marriage, two horizontal lines connecting square and circle indicate consanguineous marriage, half-shaded symbols indicate carrier individuals, and fully-shaded symbols indicate affected individuals.
