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.
Diagram of the structure of the maize B in relation to nondisjunction. Regions 1 and 2 are trans acting, and are thought to signal the sensitive sticking sites of essential region 3. Deletion of regions 1 or 2 causes complete elimination of nondisjunction. Region 4 modifies the rate of nondisjunction, but its loss does not eliminate it. c, Centromere; s, short arm. (Based on Carlson, 1986.).
