Down syndrome: Cause Down syndrome is a genetic condition that is usually caused by an extra copy of the twenty-first chromosome. Most people have two copies of each chromosome, for a total of 46.

Gene Behind Heart Defects in Down Syndrome Identified Jan. 24, 2024 — Researchers have identified a gene that causes heart defects in Down syndrome, a condition that results from an additional ...

Kenny was a white Bengal tiger with a deformed face and cross-eyes due to inbreeding. Explore the unique story of Kenny, 'the tiger with Down syndrome'.

John Cronin, a 28-year-old entrepreneur with Down Syndrome, turned his love for vibrant socks into John's Crazy Socks, the ...