The chance of conceiving a baby with Down syndrome
A) rises with the mother's age at conception.
B) lessens with the mother's age at conception.
C) is entirely due to environmental teratogens.
D) is about 10 percent of all births.
Question 2
You are examining a child who is short and stocky, with a small head, round face, slanted eyes, and a flat nose. She is cheerful and affectionate, but seems to have muscle weakness and difficulty learning. You should suspect that she may have
A) Turner's syndrome.
B) Down syndrome.
C) mitochondrial syndrome.
D) Bowlby's syndrome.