What genetic disorder that is caused by an extra copy of chromosome 21?

my little sis was born w downs n she functions as a 5 to6 yr old, unless it involves music. motown, coutry, gospel, boy bands...etc. her knowledge is fierce! plus, she has NO heart defects n after years of work excellent muscle strength control.at age 48 years, we still put a brass key out for santa every year. my sis, beyond doubt a blessing most appreciated. true love

The most beautiful people in the world have downs

I work 12 hours a day with the mentally challenged. And it is very rewarding when an individual learns to be more independent and making decisions concerning their lives.

My daughter has 22q11.2 duplication. 22q11.2 deletion is the second most common chromosomal abnormality after Down Syndrome but most people haven't heard of it.

The actual saying is DOWNS SYNDROME and NOT DOWN SYNDROME

Tina's twin, what is a brass key for santa mean.?

i dont have down syndrome

I had a neighbor that had down syndrome one of the sweetest person I've ever met in my life.

sorry I'm mistaken I'm receiving

Renée, I don't wanna put thumbs up, coz that ain't anything 2B happy about

wow! who knew?? :)