1. Most babies are born with ................. pairs of chromosomes.

23

55

92

22

2. Roughly ................. babies are born with the condition in the U.S.

6,000

4000

8000

10000

3. Women aged ................. and older are more likely to have their pregnancy affected by the syndrome.

20

35

15

12

4. More than ................ people are living with the condition in the U.S. today.

400,000

5000000

900000

10000

5. Down syndrome occurs because of changes in the way cells in chromosome ............... divide.

21

25

27

33

6. Symptoms and their severity are ............... from person to person.

different

similar

typical

same