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The history of the field of genetics includes a number of major discoveries made by scientists, some of whom became very famous and others who have almost been forgotten.

The study of genetics began with the discoveries of Mendel, who studied pea plants and identified the basic laws of inheritance.

Punnett Square showing single-locus inheritance. "Mendelian Inheritance." Wikipedia. Wikimedia Foundation, n.d. Web. 17 Oct. 2016. https://en.wikipedia.org/wiki/Mendelian_inheritance#/media/File:Punnett_square_mendel_flowers.svg.

His work identified that many genes are inherited in a
Select Option dominant/recessivecodominant
manner, as shown in the Punnett square above. This work was supplemented by the determination that the molecule responsible for inheritance is DNA, which was proven by Hershey and Chase using bacteriophages. This experiment determined that DNA was the inheritance molecule by labeling protein with
Select Option radiolabelled sulfurradiolabelled phosphorus
and DNA with
Select Option radiolabelled sulfurradiolabelled phosphorus
.

DNA was determined to be the molecule used for inheritance via this experiment using radioactive molecule-labelled bacteriophages. Thomasione. Wikipedia. Wikimedia Foundation, n.d. Web. 17 Oct. 2016. https://en.wikipedia.org/wiki/Hershey%E2%80%93Chase_experiment#/media/File:Hershey_Chase_experiment.png.

The structure of DNA was then determined using X-ray crystallographic images produced by
Select Option Franklin and GoslingWatson and Crick
and later interpreted by
Select Option Franklin and GoslingWatson and Crick
.
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