Clarence Erwin McClung was an American #geneticist and paleontologist who discovered the role of…

Clarence Erwin McClung was an American #geneticist and paleontologist who discovered the role of #chromosomes in #sex determination in a species of grasshopper.

In a key paper, he reported that #sperm exist in two forms, each with a different chromosome configuration.

Thus, he was one of the first (1901) to deduce that chromosomes determine the sex of offspring.

McClung also studied how the behaviour of chromosomes in the sex cells of different organisms affects their #heredity.

His theory was one of many that inspired scientists to pursue investigations such as the #HumanGenomeProject, an attempt to map the structure and location of all human #genes.

He also published on Cretaceous fishes.

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