The mother has sickle cell disease;Father is normal;Chances of children having sickle cell disease and sickle cell trait respectively are:

The mother has sickle cell disease;Father is normal;Chances of childre

1.	The mother has sickle cell disease;Father is normal;Chances of children having sickle cell disease and sickle cell trait respectively are:
A.	50 and 50%
B.	10 and 50%
C.	0 and 100%
D.	25 and 25%
Answer» D. 25 and 25%