1. Matrilines are also said to influence caste determination within the species. 2. Caste determination in stingless bees is more variable than in honey bees.3. Caste determination in Hymenoptera is either trophogenic or genetic.4. Trophogenic caste determination is much more common; genetic caste determination is quite rare. 5. Trophogenic caste determination is much more common; genetic caste determination is quite rare. 6. A more promising explanation of caste determination involves a pheromone excreted by the current queen. 7. In genetic caste determination , an organism's caste is inherent in its genetics. 8. The 3 : 1 ratio of workers to gynes provides evidence of genetic caste determination . 9. It has also been found that caste determination is irreversibly determined by temperature during the immature stages of development. 10. This reproductive control or suppression has been recently credited to pre-imaginal caste determination via the mechanism of insemination.
