haploid

Haploid-diploid sex determination

A biological system where the sex of an offspring is determined by the number of sets of chromosomes it receives.

Organisms with haploid-diploid sex determination

All Hymenoptera

Unfertilized egg development

Develops into a male that is haploid (N)

Fertilized egg development

Develops into a female that is diploid (2N)

Male chromosome inheritance

One set of chromosomes (N) inherited from the mother; males have no father.

Female chromosome inheritance

Two sets of chromosomes (2N)

Effect of fertilization on sex

Fertilized eggs become females; unfertilized eggs become males.

Colony genetics implication

Leads to unique genetic relatedness within colonies of social Hymenoptera.

Parasitoid population implication

Influences the dynamics and genetic structure of parasitoid populations.