Identify the odd one out:

Sex determination in humans is identified by:

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.

Who traced a specific nuclear structure all through spermatogenesis in a few insects and named it $x-$body?

In $Drosophila$,the sex is determined by

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