Egg Collection and Incubation To determine if hatchling sex ratios change across the nesting season, we collected clutches of red-eared slider eggs both early and late in the and nesting seasons. Our data demonstrate that seasonal maternal effects operate to reinforce existing TSD patterns driven by incubation temperatures.
Review of Biology. Human fetus genitals can sometimes develop abnormalities during maternal pregnancies due to mutations in the fetuses sex-determinism system, resulting in the fetus becoming intersex. More research must be conducted in order to determine the exact sex determining gene of the platypus.
Carroll, R. The turtles were incubated at temperatures that produce solely males, both sexes, and solely females. However, in the lowlands, temperatures are more constant and a longer activity season allows for favorable conditions for TSD. From Wikipedia, the free encyclopedia. Molecular Biology of the Cell.
New England Journal of Medicine. Reprints and Permissions. Help Community portal Recent changes Upload file. Environmental sex determination in reptiles. Bibcode : PLoSO Nature menu. Ferguson, M.
TSD may be beneficial as a means by which parents maintain Fisherian offspring sex ratios in which equal investments are made in sons and daughters because, in some species, fitness of sons and daughters co-vary with the environment Fisher ; Charnov and Bull Journal of biosciences.
Yolk steroids decline during sexual differentiation in the alligator.