Insect genetics

chromosomal system that determines the sex of offspring in birds, some fish, some insects and crustaceans, and some reptiles

thumb |upright=2.0 |In the Hymenoptera, the [[sex-determination system involves haploid males and diploid females. System for honey bee shown.]]

large chromosome that provides a high level of function in tissues such as salivary glands

sex-determination system, with only 1 sex chromosome (“X”); males only have 1 X chromosome (X0); females have 2 (XX); found in most arachnids, many insects, some nematodes, some crustaceans, some molluscs, and some fish (e.g. Ancistrus)