News tagged with aneuploidy

Aneuploidy is an abnormal number of chromosomes, and is a type of chromosome abnormality. An extra or missing chromosome is a common cause of genetic disorders (birth defects). Some cancer cells also have abnormal numbers of chromosomes. Aneuploidy occurs during cell division when the chromosomes do not separate properly between the two cells. Chromosome abnormalities occur in 1 of 160 live births. The most common extra chromosomes among live births are 21, 18 and 13.

Different species have different numbers of normal chromosomes and thus the term "aneuploidy" refers to the chromosome number being different for that species.