Which of the following is produced from an unfertilized egg?

Which of the following statements are true with reference to the sex-determination in honeybees?
$A$. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker).
$B$. An unfertilized egg develops as a male by parthenogenesis.
$C$. $A$ male has half the number of chromosomes than that of a female.
$D$. Males produce sperms by meiosis.
$E$. Honeybees have a haplodiploid sex determination system.
Choose the correct answer from the options given below:

Henking observed that in a few male insects,$50 \%$ of the sperm received a specific nuclear structure known as $X$-body,whereas the other $50 \%$ of sperms did not receive it. This method of sex determination was:

What determines the sex of the embryo?

Describe the haplo-diploid sex determination system.

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