What is the number of chromosomes in a sterile female worker bee in a beehive?

The genes,which are confined to the differential region of the $Y$ chromosome only,are called:

Assertion : In humans,the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.

The recessive genes located on the $X$-chromosome in humans are always:

The chromosomes which determine the somatic characters are called

Excessive growth of hair on the pinna is a feature found only in males because