Mendel and the History of Genetics
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Transcript of Mendel and the History of Genetics
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Mendel and the History of Genetics
Gregor Mendel
Born 1822
Began his work at age 21
A monk and school teacher interested in plant breeding
Studied pea plants
Discovered the basic principles of heredity
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Mendel’s StudiesPea plants were an ideal choice for
study
Displayed seven traits in one of two contrasting forms:
• seed shape• seed color• seed coat color• pod shape• pod color• flower position• stem length
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Mendel’s Pea Plant
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Removed stamensfrom purple flower
Transferred sperm-bearing pollen fromstamens of white flower to egg-bearing carpel of purple flower
Parentalgeneration(P)
Pollinated carpelmatured into pod
Carpel(female)
Stamens(male)
Planted seedsfrom pod
Examinedoffspring:all purpleflowers
Firstgenerationoffspring(F1)
Mendel’s monohybrid
crosses
Crossed male pea parts (stamens) and female pea parts (carpels) with opposite traits
Carpel matures to first-generation offspring (F1)=
PURPLE FLOWERS
Mendel’s Procedure