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.
Confocal imaging through a maternal cell (highlighted by arrow). The X chromosome is indicated by a red dot and the Y chromosome by a green dot. The nucleus is stained blue with DAPI. Imaging through this maternal cell, 2 X chromosomes (and no Y chromosomes) are observed.
