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

The initial experiments for the genetic basis of sex determination were performed on $........$.

Honeybees produce their young ones only by sexual reproduction. Inspite of this,in a colony of bees we find both haploid and diploid individuals. Name the haploid and diploid individuals in the colony and analyse the reasons behind their formation.

In $Drosophila$,the $XXY$ condition results in a female,whereas in humans,the same condition results in a male with $Klinefelter's$ syndrome. This proves that:

From the chromosomal complements given below,identify the one which shows female heterogamety.

In the drones of honeybee,there is no reduction in chromosome number during spermatogenesis. This indicates that