s42
sudha2015 - 10-19-11 04:35

A retarded 45-year-old man living in Mexico becomes ill with pneumonia
and his family brings him across the border to the United States. He
succumbs to his illness and an autopsy is performed. Neuropathological
examination of his brain reveals neuritic plaques and neurofibrillary
tangles. Which of the following was the most likely cause of this man's
retardation?
A. Down's syndrome
B. Edwards' syndrome
C. Fragile X syndrome
D. Patau syndrome
E. Supernumerary Y syndrome