aneuploidy
aneuploidy A condition in which a person has one or a few chromosomes above or below the normal chromosome number. For example, three copies of chromosome 21, which is characteristic of Down syndrome, is a form of aneuploidy.
aneuploidy A condition in which a person has one or a few chromosomes above or below the normal chromosome number. For example, three copies of chromosome 21, which is characteristic of Down syndrome, is a form of aneuploidy.