i feel bad about making fun of Ronald all these years
Down syndrome is a condition in which a person has an extra chromosome. ... Typically, a baby is born with 46 chromosomes. Babies with Down syndrome have an extra copy of one of these chromosomes, chromosome 21. A medical term for having an extra copy of a chromosome is 'trisomy.
www.cdc.gov › ncbddd › birthdefects › downsyndrome Facts about Down Syndrome | CDC