Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR X CHROMOSOMES

It was seen that if in some way the X chromosomes failed to disjoin in certain eggs, the exceptions could be explained.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.