nondisjunction(redirected from Chromosomal nondisjunction)
Also found in: Dictionary, Thesaurus, Medical.
Related to Chromosomal nondisjunction: Meiotic nondisjunction
Failure of homologous chromosomes to separate symmetrically during cell division, with both ending up in the same daughter cell instead of in each daughter cell.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.