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“The Father of Genetics”

“The Father of Genetics”. Gregor Johann Mendel (1822-1884) Shane Connolly. Johann Mendel. Born July 22, 1822 Born in present day Czech Republic Son of a peasant farmer Only son (2 sisters) Almost didn’t go to school Poor Father’s injury. Education.

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“The Father of Genetics”

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  1. “The Father of Genetics” Gregor Johann Mendel (1822-1884) Shane Connolly

  2. Johann Mendel • Born July 22, 1822 • Born in present day Czech Republic • Son of a peasant farmer • Only son (2 sisters) • Almost didn’t go to school • Poor • Father’s injury

  3. Education • 1841 - Philosophy Institute of Olomouc • 1843 - St. Thomas Monastery • Augustinian Order • Took test to become teacher - failed • 1851 - University of Vienna • Studied to teach Math and Biology • Became ill when he went to take test again

  4. Early Work • Curious about the characteristics of different species • Started work with the color of mice hair

  5. Pea Experiment • 7 characteristics tested • position of the flowers on the stem • stem length • color of the unripe pod • shape of the ripe seed • color of the seed coat • shape of the ripe pod • color of the ripe seed

  6. Pea Plants (cont.) • First experimented with round seeds and wrinkled seeds • Tried pure round seeds and pure wrinkled seeds next to each other • Bred pure round seeds with pure wrinkled seeds and all came out round • Next generation saw round seeds at a 3:1 with wrinkled seeds

  7. Basics of Heredity • Dominant trait (A) - trait that when combined purely with another pure opposite trait, will show up in the next generation • Recessive Trait (a) - trait that when combined purely with another pure opposite trait, will not show up in the next generation • Called the traits “factors”

  8. Mendel’s Laws • The Law of Segregation - Each parent carries 1 trait that are combined together during reproduction, even though only 1 shows • Law of Independent Assortment - When parents with 2 different traits reproduce the inheritance of one trait does not affect the inheritance of the other, and chance decides which one does show up • Law of Dominance - There will always be 1 dominant trait and 1 recessive trait.

  9. End of Work • Presented these findings in a paper called "Experiments in Plant Hybridization" to the Association for Natural Research twice • Published by the association a little later • Work was unrenowned, too complicated • 1863 - became abbot of monastery • 1870 - Tornado took out greenhouse • Died Jan. 6, 1884

  10. "My scientific labors have brought me a great deal of satisfaction, and I am convinced that before long the entire world will praise the result of these labors.”

  11. Rediscovery • 1900 3 scientist rediscovered • Carl Correns in Germany • Hugo de Vries in the Netherlands • Erich von Tschermak-Seysenegg in Austria • Development of phenotype vs genotype • 1911, Wilhelm Johannsen • Punnet Squares • Reginald Crundall Punnett • Still accepted today

  12. Summary • Served as a monk in the Augustinian Order • Discovered the concept of dominant and recessive traits • Work wasn’t recognized until 25 years after his death

  13. References • http://www.mnsu.edu/emuseum/information/biography/klmno/mendel_gregor.html • http://mendel.imp.ac.at/mendeljsp/biography/biography.jsp • http://astro4.ast.vill.edu/mendel/gregor.htm • http://web.pdx.edu/~cruzan/Kid's%20Mendel%20Web/Johann%20Mendel.htm • http://www.accessexcellence.org/RC/AB/BC/Gregor_Mendel.php • http://www.strangescience.net/mendel.htm

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