In Birds, the Female Carries an Unmatched Pair of Chromosomes

In birds, the female carries an unmatched pair of chromosomes (denoted WZ) , corresponding roughly to the XY chromosomes in mammalian males, and male birds carry a matched set of chromosomes (denoted WW) , corresponding to the pair of XX chromosomes in mammalian females. Therefore, in birds the ________ chromosome determines the sex of the offspring, and it is gametes from the ________ parent that determine sex.

A) Z, male
B) Z, female
C) W, female
D) W, male
E) W, either male or female