What organ would a medical examiner identify a badly decomposed body as female?

Here, no of pairs of chromosomes in ant = 4.  

Now during the gametogenesis, each pair of chromosome will get separated in one gamete each.  

So, number of unpaired chromosomes = 4 unpaired chromosomes.  

The gametes are now haploid, i.e. Without paired chromosomes.  

Now, only 1 of the one pair of chromosomes will be carried inside a gamete,

Lets assume, the gene present in the cell chromosomes is heterozygote  

So,  there will be 2 possibilities.  

So, their probability will result as possibilities.

Then for 4 chromosomes would be chromosomes.