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The first genetic map, using drosophila to measure crossover frequencies, was actually and personally constructed by:

User Hervey
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The first genetic map was constructed by Alfred Sturtevant. In 1913, he was the first constructing a genetic map of chromosome. He worked on the biological model drosophila melanogaster next to Thomas Morgan, another geneticist.
User Pankhuri Agarwal
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The first genetic map was constructed by STURTEVANT.
Sturtevant is an American geneticist, he constructed the first genetic map in 1913 using the drosophila chromosomes.
Genetic map is the graphical representation of the arrangement of genes on a chromosome. Genetic map is used to locate gene or group of genes that determine particular traits.
User ChruS
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