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On the Generation of Animals, by Aristotle - Image

Johann Gregor Mendel (1822–1884)

Johann Gregor Mendel studied patterns of trait inheritance in plants during the nineteenth century.

Roger Sperry’s Split Brain Experiments (1959–1968) - Image

Rh Incompatibility in Pregnancy - Image

Rh factor is a protein found on the outside of Rh-positive red blood cells.

Virginia Apgar (1909–1974) - Image

During the mid-twentieth century, Virginia Apgar worked as an obstetrical anesthesiologist and gave drugs to women that reduced their pain during c

Human Papillomavirus (HPV) Strains 6 and 11 and Strains 16 and 18

Human Papillomavirus, or HPV, is a viral pathogen that most commonly spreads through sexual contact.

The First Successful Cloning of a Gaur (2000), by Advanced Cell Technology - Image

The first successful cloning of a gaur in 2000 by Advanced Cell Technology involved the cells of two animals: an egg cell from a domestic cow and a

Estrogen

The figure depicts three different molecular structures of estrogen found in mammals’ that differ by the arrangement of bonds and side groups.

Jelly Fish and Green Fluorescent Protein

The crystal jellyfish, Aequorea victoria, produces and emits light, called bioluminescence.

DNA and X and Y Chromosomes

Y-chromosomes exist in the body cells of many kinds of male animals.