A) excessive bleeding
B) colour blindness
C) paralysis of a limb
D) mental retardation and abnormal facial appearance with large ears and long face
Correct Answer: D
Solution :
Fragile X syndrome also known is Martin Bell syndrome, discovered by Martin and Bell in 1943. The term Fragilie X is derived from the fact that the X-chromosome of affected individuals, when cultured in a medium that is deficient in folic acid exhibits breaks or graps near the tip of long arm.
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