lew morgan

Morgan 

Main Entry: mor·gan
Pronunciation: 'mor-g&n
Function: noun
1 : a unit of inferred distance between genes on a chromosome that is used inconstructing genetic maps and is equal to the distance for which the frequency of crossing-over is 100 percent
2 : CENTIMORGAN
Morgan, Thomas Hunt (1866–1945), American geneticist. Morgan spent much of his career as a professor of experimental biology at ColumbiaUniversity. He became a pioneer in the developing science of genetics. In 1908 and 1909 he began a series of experiments first with mice and rats and then with fruit flies of the genusDrosophila. During the next several years he discovered many mutant traits, such as eye colors, body colors, and wing variations, and determined the modes of heredity. He and the members of hisexperimental laboratory made such advances in genetics as a clear understanding of sex-linkage, final proof of the chromosome theory of heredity, establishment of the linear arrangement of genes in thechromosome, the demonstration of interference in crossing-over, and the discovery of chromosomal inversions. He was awarded the Nobel Prize for Physiology or Medicine in 1933.

Morgan Mor·gan (môr'gən), Thomas Hunt. 1866-1945.

American biologist. He won a 1933 Nobel Prize for establishing the chromosome theory of heredity by his studies of the fruit fly Drosophila.

Morgan   (môr'gən)  Pronunciation Key  American zoologist whose experiments with fruit flies demonstrated that hereditary traits are carried by genes on chromosomes and that traits can cross over from one chromosome to another. He was awarded the Nobel Prize for physiology or medicine in 1933.