Geneticist who also discovered what would become referred to as the XY sex-determination program. She was a co-employee in experimental morphology at Bryn Mawr University. She received her Bachelor and Experts of Arts from Stanford before learning cytology at Bryn Mawr University. Google presented her inside a doodle on what could have been her 155th birthday in 2016. She passed away of breast malignancy at John Hopkins Medical center nine years after completing her Ph.D. She actually is buried following to her dad Ephraim and sister Emma in Westford, Massachusetts. She and Richard Lewontin are notable for their efforts as geneticists.