Complementary Sex Determination
As a complementary sex determination (engl. Complementary sex determination ) is a system of Geschlechtsdetermination in some types of Hymenoptera designated (Hymenoptera).
With normal haplodiploidy in hymenoptera, sex is only determined by the presence of a double ( diploidy ) or single ( haploidy ) set of chromosomes . Diploid animals are always female and haploid are always male.
In the presence of complementary sex determination, males develop despite a diploid chromosome set if the genotype is inherited . This can have serious consequences, especially with severe inbreeding , as the diploid males are often sterile .
The exact evolutionary advantages and disadvantages of complementary sex determination have not yet been clarified.