In humans, the male has an X and Y sex chromosome. The human female has two
X chromosomes. In birds, the female has a Z and a W sex chromosome while the
male has two Z chromosomes. Which of the following statements is accurate
about which parent controls the gender of the offspring?
a. In humans and birds the male controls the gender of all the offspring.
b. In humans and birds the female controls the gender of all the offspring.
c. In humans the male controls the gender of the offspring, and in birds the female controls the gender.
d. In humans the female controls the gender of the offspring, and in birds the male controls the gender.
e. Control of the gender of any human or bird offspring is related to the environmental conditions at the time of conception.