Sexual differentiation in humans Sexual differentiation in humans Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. Sexual differentiation includes development of different genitalia and the internal genital tracts, breasts, body hair, and plays a role in gender identification. The development of sexual differences begins with the XY sex-determination system that is present in humans, and complex mechanisms are responsible for the development of the phenotypic differences between male and female humans from an undifferentiated zygote. Females have two X
The Role of Culture in Early Expansions of Humans The Role of Culture in Early Expansions of Humans The Role of Culture in Early Expansions of Humans (ROCEEH) is an interdisciplinary project of the Heidelberg Academy of Sciences and Humanities. Within the framework of this Research Center social scientists and natural scientists study the effect that culture had on the successive expansions of humans out of Africa and across the Old World. The Research Center is located at the Eberhard Karls University of Tübingen and the Senckenberg Research Institute in Frankfurt am Main. The project was initiated in 2008 by the Heidelberg Academy of Sciences and Humanities and is