Final answer:
In insects like ants, wasps, and bees, males develop from unfertilized eggs using a haploid-diploid system, resulting in a haploid number of chromosomes.
Step-by-step explanation:
In insects belonging to the order of ants, wasps, and bees, a unique system called haplodiploidy is used. In this system, females develop from fertilized eggs and have a diploid number of chromosomes, while males develop from unfertilized eggs and have a haploid number of chromosomes. This means that males have half the number of chromosomes compared to females.