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Also Refer: Principles of Heredity Explore more: Determination Of Sex Genetic Disorders Disorders of a Mendelian nature include: Disorders of a chromosomal nature include:

It seemed that genes were parts of chromosomes. In 1910 this idea was strengthened through the demonstration of parallel inheritance of certain Drosophila (a type of fruit fly) genes on sex-determining chromosomes by American zoologist and geneticist Thomas Hunt Morgan. Morgan and one of his students, Alfred Henry Sturtevant, showed not only that certain genes seemed to be linked on the…