Down syndrome is caused by A) improper migration of brain ...

[anshika]

Down syndrome is caused by
 
  A) improper migration of brain cells during brain development.
  B) an inherited faulty gene.
  C) a genetic error in which a vital enzyme is missing in the brain.
  D) the presence of an extra twenty-first chromosome.
  E) obstetric difficulties at the time of birth.

Question 2

Treatment for phenylketonuria consists of early diagnosis and
 
  A) a diet low in thyroxine.
  B) a complete blood transfusion at birth.
  C) a shift to diet low in phenylalanine.
  D) lifelong supplemental phenylalanine.
  E) daily injections of the precursor of phenylalanine.

[nhea]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: C

[anshika]

Excellent

[fatboyy09]

Thanks for the timely response, appreciate it