TeyxoLu
contestada

100 POINTS!! Pls help!

(I messed up putting the points on the other one)


Down syndrome, the most common genetic condition in the United States, is also known as Trisomy 21. What does this mean.

A. A person with Down syndrome has three copies of chromosome 21 instead of two copies. An extra chromosome 21 was present in either the sperm or the egg cell.

Respuesta :

All I know is lahat ng may Down Syndromes is same lahat ng face