Edward Butts Lewis (May 20, 1918 – July 21, 2004) was an American geneticist, a corecipient of the 1995 Nobel Prize in Physiology or Medicine.

In 1942 Lewis received a PhD from California Institute of Technology (Caltech), working under the guidance of Alfred Sturtevant.

Lewis enrolled in the U.S. Army Air Corps training program in meteorology in 1942 and later received his master's degree in the area a year later.

As he left for military service in 1943, he was told by the university president Robert A. Millikan that he had a position as an instructor at Caltech when he returned.

Pam developed an infection that caused her to have a visual and physical, partial unilateral paralysis, which limited her mobility.

[11] His Nobel Prize–winning studies with Drosophila, (including the discovery[12] of the Drosophila Bithorax complex of homeotic genes, and elucidation of its function), founded the field of evolutionary developmental biology and laid the groundwork for our current understanding of the universal, evolutionarily conserved strategies controlling animal development.

He reviewed medical records from survivors of the atomic bombings of Hiroshima and Nagasaki, as well as radiologists and patients exposed to X-rays.

Lewis published articles in Science and other journals and made a presentation to a Congressional committee on atomic energy in 1957.