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Gregor Mendel

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Matt Hicks

on 3 October 2012

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Transcript of Gregor Mendel

The "Father of Modern Genetics" Gregor Mendel Born in 1822
Grew up on a farm, in what is now Czech Republic Mendel's Childhood Gregor Mendel went back to the monastery and studied plants in the monastery's garden.
He began to breed pea plants and record the results to learn how traits are passed down. Entered an Augustinian monastery at age 21
Tried to become a teacher, but failed the necessary examination
Went back to school for two more years of study At the time that Mendel was living, people believed in blending inheritance. According to this theory, offspring got their traits through a mixture of all of your parents traits. For example, if you had a red parent and a white parent, you would turn out to be pink.

There were flaws in this theory, but they were unable to be figured out until Gregor Mendel came along. Before Mendel Here is an example: Think of how bland life would be if the ideas of blending inheritance were actually true. These next two years at school were BiG For the two years he went back to school, he studied science. This is Mendel He is now a scientist As a scientist, Mendel studied things such as astronomy and meteorology. (That's not what he's famous for though) Mendel became famous for studying variation in plants and making discoveries about heredity and genetics. That must explain the nickname: the "father of modern genetics" Why pea plants?
Mendel used pea plants because pea plants have either- or traits, meaning there are only two options for all of the traits. peas are either yellow or green, wrinkled or smooth, and have white or purple flowers.

This helped prove the "blending" theory wrong which was the existing idea at the time. Lets use height. because traits are blended, eventually all genetic variation will be Within a population, there are all types of different heights. But over the generations, the traits are blended.... That's when Mendel steps in gone. After breeding and observing thousands of pea plants, Mendel created two new scientific laws. The law of segregation: each organism contains a pair of alleles for each trait. law of independent assortment: separate genes for separate traits are passed independently of one another Gregor Mendel's work was not of any real importance for the next 40 years. When his works were found 15 years after his death people began to do further research on the topic based off of Mendel's works. One scientist to follow up on Mendel's work was R.C. Punnett. He came up with the Punnett square to show possible allele combinations. Punnett squares are still used today and can
be simple like the one shown here.... Or more complex like the one shown here. They still have the same purpose in showing allele combinations for the offspring. Mendel's work laid the foundation for modern day genetics. It is amazing that we still uses the idea of independent assortment, that he found out decades and decades ago. Just as mind blowing as the discoveries themselves, are how he made them. Today we have new technology that greatly helps with science. We have microscopes that can observe cells and genes and chromosomes. It might have been easier if Mendel had all of this. But he didn't. He had a monastery garden, a lot of pea plants, a book to record observations, and a n intelligent mind. What do we use genetics for? Genetics are used commonly in medical sciences. There are many genetically linked diseases and genetic disorders that are passed down from generation to generation and we are always looking for ways to help prevent these. We have made great advances in medics through learning about cells, chromosomes and genetics in general. Genetics aren't only used in the medical field though. We also use genetics with plants, not just humans or animals. We now have the ability to genetically grow plants in a laboratory with the features we want them to have. "My scientific studies have afforded me great gratification; and I am convinced that it will not be long before the whole world acknowledges the results of my work." Mendel realized he had hit something big. And the science world has too. -Gregor Mendel Gregor Mendel had a positive impact on the
world, especially in the field of science. And the impact was BIG He created the law of inheritance And the law of segregation He laid the foundation for modern day genetics
as we know it. Mendel wrote all of his observations in a journal
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