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173179 https://hdl.handle.net/10776/11871 2017-06-23 eng Garcia, Dasia Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia. Arizona Board of Regents open access http://creativecommons.org/licenses/by-nc-sa/3.0/ Curt Jacob Stern studied radiation and chromosomes in humans and fruit flies in the United States during the twentieth century. He researched the mechanisms of inheritance and of mitosis, or the process in which the chromosomes in the nucleus of a single cell, called the parent cell, split into identical sets and yield two cells, called daughter cells. Stern worked on the Drosophila melanogaster fruit fly, and he provided early evidence that chromosomes exchange genetic material during cellular reproduction. During World War II, he provided evidence for the harmful effects of radiation on developing organisms. That research showed that mutations can cause problems in developing fetuses and can lead to cancer. He helped explain how genetic material transmits from parent to progeny, and how it functions in developing organisms. Chromosomes Heredity Mitosis Drosophila Drosophila melanogaster Fruit-flies Radiation Heliozoa Germ Cells UNESCO Genetics Mendel's law Human Genetics Mutation (Biology) Genetic recombination Chromosome Abnormalities Sex Chromosomes Crossing over (Genetics) Meiosis Cell Division National Academy of Sciences (U.S.) Stern, Curt, 1902-1981 Morgan, Thomas Hunt, 1866-1945 Bridges, Calvin B. (Calvin Blackman), 1889-1938 Columbia University California Institute of Technology Goldschmidt, Richard, 1878-1958 University of Rochester Curt Jacob Stern (1902-1981)