Quote by Alfred Hershey

"The gene is the unit of selection, the level at which natural selection operates most effectively."

"We are all survival machines for our genes."

"Bacterial genetics opened up the entire field of molecular biology."

"The phage group changed everything we thought we knew about heredity."

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."