Down's Syndrome is caused by an extra copy of chromosome number 21. What percent age of off spring produced by an affected mother and a normal father? AIPMT - 2003

Down's Syndrome is caused by an extra copy of chromosome number 21. Wh

1.	Down's Syndrome is caused by an extra copy of chromosome number 21. What percent age of off spring produced by an affected mother and a normal father? AIPMT - 2003
A.	100%
B.	75%
C.	50%
D.	25%
E.	cessive
Answer» E. cessive