Biology of Sex Definitions
Written By Zachary Elliott

Below is a list of definition cards for various terms in the biology of sex. Each card is cited at the bottom with peer-reviewed biology research. You can click on them to expand them.
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Activists claim that trans-identified people have opposite sex brains. But what does the science actually say? The following is an excerpt from the book, Binary.
The Paradox Institute’s official 8-step action plan to eliminate gender ideology.

Zach is a science communicator specializing in sex and gender. He’s the author of three books on the biology of sex and the producer of animated videos on sex differences.