Mendelian Genetics

Genetics as a science originated about a generation before its significance became appreciated in the scientific community as a whole. An Austrian monk, Gregor Mendel (Fig. 13.9) taught between 1853 and 1868 in what became the

Figure 13.8 Leaves of potato plants. Left: A tetraploid. Right: A diploid.

Figure 13.8 Leaves of potato plants. Left: A tetraploid. Right: A diploid.

Mendelian Inheritance
Figure 13.Q Gregor Mendel. Photo ca. 1870's, Brunn, Moravia. Courtesy Brooklyn Botanic Gardens, New York. Print at Hunt Institute, Pittsburgh, PA.

Czechoslovakian city of Brno. In the monastery there, he carried out a wide range of studies in physics, mathematics, and natural history. He also became an authority on bees and meteorology and kept notes on experiments involving two dozen different kinds of plants. Today, he is best known for the studies he conducted with peas.

Mendel published the results of his studies on pea plants in a biological journal in 1866 and sent copies of his

Chapter 13

paper to leading European and American libraries. He also sent copies to at least two eminent botanists of the time. His work, nevertheless, was completely ignored or overlooked until 1900, when three botanists (Eric von Tschermak of Austria, Carl Correns of Germany, and Hugo de Vries of Holland), working independently in their own countries, reached the same conclusions as Mendel. Each, as a result of library research, came across Mendel's original paper.

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Essentials of Human Physiology

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