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He had a handle on biology
Else clues• Famed English biologist: 1892-1964
• Scottish geneticist (son of John Haldane) who contributed to the development of population genetics
• A popularizer of science and a Marxist (1892-1964)
• Scottish physiologist and brother of Richard Haldane and Elizabeth Haldane
• Noted for research into industrial diseases (1860-1936)
• Scottish writer and sister of Richard Haldane and John Haldane (1862-1937)
• Scottish statesman and brother of Elizabeth and John Haldane (1856-1928)