1911, from German Gen, coined 1905 by Danish scientist Wilhelm Ludvig Johannsen (1857-1927), from Greek genea "generation, race" (from PIE root *gene- "give birth, beget"). De Vries had earlier called them pangenes. Gene pool is attested from 1946.
genes were formerly called factors
gemmologist
gemstone
-gen
gendarme
gender
gene
*gene-
genealogical
genealogist
genealogy
genera