Author Question: Which of the following disorders results from a mutation that produces an extra chromosome 21? A) ... (Read 139 times)

chandani · **on:** Jun 22, 2018

Which of the following disorders results from a mutation that produces an extra chromosome 21?

A) Down syndrome
B) meningitis
C) tardive dyskinesia
D) general paresis
E) multiple sclerosis

Question 2

Neurological disorders are rarely caused by dominant genes

A) because all individuals carrying them would be at a major disadvantage in terms of survival and reproduction.
B) unless the dominant genes do not express themselves until after the peak reproductive years.
C) because dominant genes rarely mutate.
D) all of the above
E) both A and B