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Gregor Mendel PowerPoint Presentation

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Gregor Mendel Presentation Transcript

Slide 1 - Gregor Mendel Group 1 Kristen Enriquez Cassandra Rojas William Zuniga Melissa Medrano
Slide 2 - Father of Modern Genetics The first person to trace the characteristics of successive generations of a living thing He was not a world-renowned scientist of his day. Rather, he was an Augustinian monk who taught natural science to high school students.
Slide 3 - Second child of Anton and Rosine Mendel They were farmers in Brunn They couldn’t afford for him to attend college Gregor Mendel then attended the Augustinian Monastery and became a monk Family
Slide 4 - Where Mendel Studied He was later sent to the University of Vienna to study. By both his professors at University and his colleagues at the monastery, Mendel was inspired to study variance in plants
Slide 5 - Gregor J. Mendel, O.S.A., experimental garden (35x7 meters) in the grounds of the Augustinian Monastery in Old Brno.Its appearance before 1922. Courtesy of Villanova University Archives. The Monastery Garden with the greenhouse whichGregor J. Mendel, O.S.A., had built in 1870. Its appearance before 1902.Courtesy of Villanova University Archives.
Slide 6 - How Mendel Got Started Mendel's attraction to research was based on his love of nature. He was not only interested in plants, but also in meteorology and theories of evolution. Mendel often wondered how plants obtained atypical characteristics.
Slide 7 - The Birth of the idea: Heredity On a walk around the monastery, he found an atypical variety of an ornamental plant. He took it and planted it next to the typical variety. He grew their progeny side by side to see if there would be any approximation of the traits passed on to the next generation. This experiment was "designed to support or to illustrate Lamarck's views concerning the influence of environment upon plants.“ He found that the plants' respective offspring retained the essential traits of the parents, and therefore were not influenced by the environment.
Slide 8 - Mendel's research reflected his personality. Once he crossed peas and mice of different varieties "for the fun of the thing," and the phenomena of dominance and segregation "forced themselves upon notice." He saw that the traits were inherited in certain numerical ratios. He then came up with the idea of dominance and segregation of genes and set out to test it in peas. It took seven years to cross and score the plants to the thousand to prove the laws of inheritance!
Slide 9 - Pictures of atypical plant
Slide 10 - Mendel’s laws of heredity From his studies, Mendel derived certain basic laws of heredity: Hereditary factors do not combine, but are passed intact; Each member of the parental generation transmits only half of its hereditary factors to each offspring (with certain factors "dominant" over others); Different offspring of the same parents receive different sets of hereditary factors.
Slide 11 - YY GG YG YG YG YG Y= Yellow allele G= Green allele YY GG YG YG F1 Generation F2 Generation YY YY YY YY YY GG YG YG YY GG YG YG GG GG GG GG
Slide 12 - Parent Generation F1 Generation F2 Generation, 3:1 ratio
Slide 13 - Mendel's work became the foundation for modern genetics. The impact of genetic theory is no longer questioned in anyone's mind. Many diseases are known to be inherited and pedigrees are typically traced to determine the probability of passing along an hereditary disease. Plants are now designed in laboratories to exhibit desired characteristics. The practical results of Mendel's research has not only changed the way we perceive the world, but also the way we live in it.
Slide 14 - Took seven years to prove laws of inheritance -Basic Laws- Heredity Factors do not combine Each member of a parental generation transfers only one half of its heredity factors to each offspring Interesting Facts
Slide 15 - Mendel’s works became the foundation of modern genetics Later crossed mice and pea plants Noticed traits were inherited in certain numerical ratios Came up with idea of dominance and segregation of genes and set out to test it in peas Love of nature encouraged his interest in research Also interested in meteorology and theories of evolution More Interesting Facts
Slide 16 - References http://205.180.85.40/w/pc.cgi?mid=10866&sid=7271 http://www.accessexcellence.org/AB/BC/Gregor_Mendel.html http://www.netspace.org/MendelWeb/MWpaptoc.html 101 Key Ideas: Genetics http://www.library.villanova.edu/html2/lib/mendel/mendexhib.htm
Slide 17 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
 

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