Text of “The Father of Genetics” Gregor Johann Mendel (1822-1884) Shane Connolly
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 didnt go to school Poor Fathers injury
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
Early Work Curious about the characteristics of different species Started work with the color of mice hair
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
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
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
Mendels 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.
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
"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.
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
Summary Served as a monk in the Augustinian Order Discovered the concept of dominant and recessive traits Work wasnt recognized until 25 years after his death