Write the letter of the event that happens first in the development of song in male zebra finches ...

Write the letter of the event that happens first in the development of song in male zebra finches next to
  1. Sequence the following events, with the final event in the pathway written next to 6.
 
  A. structure and function of neurons are changed
  B. neurons anticipate key acoustical events
  C. a territory owner habituates to the sound of his singing neighbor
  D. exposure of hatchling to its species' song
  E. an enzyme is produced
  F. zenk is activated
  1.
  2.
  3.
  4.
  5.
  6.

Question 2

Full siblings share 25 percent of their alleles.
 
  Indicate whether the statement is true or false.