Number of autosomes in a normal human female is

In which of the following is male heterogamety $NOT$ observed?

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

In a population of a grasshopper species,the chromosome number of some members is $23$ and some other members possess $24$ chromosomes. The $23$ and $24$ chromosome-bearing members in this species are . . . . . . .

The sex of the offspring,whether it will be male or female,is determined by which of the following?

Organism with male heterogamety $- P$
Organism with female heterogamety $- Q$
$I -$ Human,$II -$ Bird,$III -$ Drosophila,$IV -$ Grasshopper
Select the correct option for $P$ and $Q$.
$\quad P \quad\quad Q$