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In page Leroy Hood:

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Hood received his undergraduate education from the California Institute of Technology (Caltech), where his professors included notables such as Richard Feynman[1] and Linus Pauling.[2][3] Hood received an M.D. from Johns Hopkins School of Medicine in 1964 and a Ph.D. from Caltech in 1968,[4] where he worked with William J. Dreyer on antibody diversity.[5] Dreyer is credited with giving Hood two important pieces of advice: “If you want to practice biology, do it on the leading edge, and if you want to be on the leading edge, invent new tools for deciphering biological information.”[6]