Hans Winkler
Hans Karl Albert Winkler (23 April 1877 – 22 November 1945) was a German botanist. He was Professor of Botany at the University of Hamburg, and a director of that university's Institute of Botany. Winkler coined the term 'heteroploidy' in 1916. He is remembered for coining the term 'genome' in 1920, by making a portmanteau of the words gene and chromosome. He wrote: 
This may be translated as: "I propose the expression "Genom" for the haploid chromosome set, which, together with the pertinent protoplasm, specifies the material foundations of the species ..."
William Bateson
Between 1900 and 1910 Bateson directed a rather informal "school" of genetics at Cambridge. His group consisted mostly of women associated with Newnham College, Cambridge, and included both his wife Beatrice, and her sister Florence Durham. They provided assistance for his research program at a time when Mendelism was not yet recognised as a legitimate field of study. The women, such as Muriel Wheldale (later Onslow), carried out a series of breeding experiments in various plant and animal species between 1902 and 1910. The results both supported and extended Mendel's laws of heredity. Hilda Blanche Killby, who had finished her studies with the Newnham College Mendelians in 1901, aided Bateson replicate Mendel's crosses in peas. She conducted independent breeding experiments in rabbits and bantam fowl, as well. 
Bateson first suggested using the word "genetics" (from the Greek gennō, "γεννώ"; "to give birth") to describe the study of inheritance and the science of variation in a personal letter to Adam Sedgwick (1854–1913, zoologist at Cambridge, not the Adam Sedgwick (1785–1873) who had been Darwin's professor), dated 18 April 1905. Bateson first used the term "genetics" publicly at the Third International Conference on Plant Hybridization in London in 1906. Although this was three years before Wilhelm Johannsen used the word "gene" to describe the units of hereditary information, De Vries had introduced the word "pangene" for the same concept already in 1889, and etymologically the word "genetics" has parallels with Darwin's concept of pangenesis. Bateson and Edith Saunders also coined the word "allelomorph" ("other form"), which was later shortened to allele.