A) 50%
B) 25%
C) 100%
D) 75%
Correct Answer: A
Solution :
Downs syndrome is the result of trisomy in which chromosome number 21st contains an extra copy of chromosome (2A + 1) Affected mother will produce 50% normal egg cells and rest 50% eggs are of abnormal type. In normal case (n + 1)- abnormal egg n-normal egg Fusion of normal egg with a normal sperm (comes from father) produces a normal offspring while fusion of abnormal egg with a normal sperm will produce an abnormal offspring.You need to login to perform this action.
You will be redirected in
3 sec