2.  By an extra chromosome 21, which
makes like be 47 chromosomes instead
of 46.

3.  No it cant be transmitted because you
get it at birth causing it to be genetic

4.  Babies get this disease from there
parent.

5.  It stays in your body because once you
have it you cant get rid of it

6.  Head maybe smaller than normal and
abnormal shaped
 Decreased muscle size
 Flattened nose, small ears, small mouth
 Upward slanting eyes
 White spots on colored part of the eyes
 Impulsive behavior
 Poor judgments
 Short attention span
 Slow learning

7.  It is chronic because it keeps going on

8.  Mother shouldn’t have babies over the
age of 35 because that increases the risk

9.  There isn't any treatment

10.  No it cant