Which of the following represents the genetic constitution of a male grasshopper?

Two different types of gametes in terms of the sex chromosomes are produced by

The following diagram shows sex determination in honeybees. How many chromosomes do $P, Q,$ and $R$ have?
$\quad\quad P \quad Q \quad R$

On which of the following can a single recessive trait express its effect?

Which chromosomes determine the male sex in the $Melandrium$ plant?

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.