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Embryo Project Encyclopedia
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Temperature-Dependent Sex Determination in Reptiles

By: Karla T. Moeller | Published: Feb 01, 2013

The sex of a reptile embryo partly results from the production of sex hormones during development, and one process to produce those hormones depends…

Sex DifferentiationReproductionAdaptationfetal developmentEmbryology

Frank Rattray Lillie's Study of Freemartins (1914-1920)

By: Mary Drago | Published: Mar 14, 2014

Frank Rattray Lillie's research on freemartins from 1914 to 1920 in the US led to the theory that hormones partly caused for sex differentiation in…

Lillie, Frank Rattray, 1870-1947Intersexuality in animalsFreemartinismHormonesExperiments

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