Definition(s)
- The
phenomenon in which a fertilized ovum initially contains 47 chromosomes (i.e.,
is trisomic), but loses one of the trisomic chromosomes in the process of
cell division such that the resulting daughter cells and their descendants
contain 46 chromosomes, the normal number
-
Definition from: GeneReviews
from the University of Washington and the National Center for Biotechnology Information
See also Understanding Medical Terminology.