Down Syndrome is an example of an aneuploidy called ________.

A) monosomy 21
B) trisomy 21
C) monosomy 23
D) trisomy 17
E) disomy 21

Aneuploidy

A genetic condition characterized by an abnormal number of chromosomes.

Trisomy 21

A genetic disorder caused by the presence of an all or part of an extra 21st chromosome, known as Down syndrome.

Monosomy

A chromosomal disorder characterized by the absence of one chromosome from the normal diploid number.