USMLE Forums - View Single Post - Repeated USMLE Questions Step 1- 313
View Single Post
  #1  
Old 03-15-2020
sohag100 sohag100 is offline
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,285
Threads: 1228
Thanked 192 Times in 171 Posts
Reputation: 202
Default Repeated USMLE Questions Step 1- 313

A 4-month-old boy is brought to the pediatrician by his parents who are concerned about a white dot on his right eye. Examination reveals a white pupillary reflex in his right eye. Imaging studies confirms the presence of a large tumor in the left eye that does not involve the optic nerve. It is diagnosed as the most common intraocular malignant tumor.
What is the chromosomal abnormality that could be present in this case?
A-Deletion of a gene on the affected chromosome
B-Duplication of a gene on the affected chromosome
C-Missing of a chromosome
D-Presence of an extra chromosome
E-Replication of a chromosome
Answer
Reply With Quote