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."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."