Sunderland MA : Sinauer Associates ; Eggs were collected and incubated as previously described [ Rhen et al. Sources Bull, James. Males, on the other hand, are "heterogametic," with one X chromosome and one Y chromosome.
Dev Dyn. Embryos were allocated to 1 of 4 groups at stage 15, including non-treated and vehicle-treated controls, a dihydrotestosterone- DHT treated group, a flutamide- Flut treated group, and a group treated with temperature dependent sex determination in animals in Markham DHT and Flut.
Alex Quinn, a Ph. This evolutionary model, called the Charnov-Bull model, outlines the conditions under which the evolution of environmental sex determination occurs, and scientists later applied it to vertebrates with TSD. Desvages et al.
Do Rats Like to Be Tickled? The sex of a reptile embryo partly results from the production of sex hormones during development, and one such process to produce those hormones depends on temperature of the embryo's environment. An Introduction to Behavioral Endocrinology. Studying the spotted skink, they observed that the highland population was not affected by temperature, yet, there was a negative correlation between annual temperature and cohort sex ratios in the lowlands.
To prove the critical role of estrogen in ovarian differentiation, it is important to show that XX gonads prior to or during early ovarian differentiation contain not only Cyp19a1a, but also all other steroidogenic enzymes necessary for the synthesis of estrogens. How to infer gene networks from expression profiles.
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