Chapter11 - Gregor Mendel Chapter 11 Mendelian Genetics...

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1 Chapter 11 Mendelian Genetics Gregor Mendel Austrian monk, worked in 1860’s Experiments with garden peas Discovered important genetic principles, but unrecognized until decades after his death Advantages of genetics with peas 1. Short generation time 2. Many offspring (each pea in a pod can be different) 3. Peas can self-pollinate or cross-pollinate Dominance Mendel worked with “true- breeding” (purebred) pea strains If he “crossed” (cross-pollinated) yellow and green pea plants, the offspring (peas) were ALL yellow Yellow is dominant over green Generations Parental P Filial First (F 1 ) or Second (F 2 )
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2 Alleles come in pairs The F 2 generation was mixed yellow and green The green must be carried but hidden Mendel saw there must be two “elements” or alleles Traits and Alleles Trait: Physical or chemical characteristic of an organism Examples: eye color, production of blood clotting factors Alleles: Different versions of the gene for a trait Examples: blue or brown eyes; normal
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This note was uploaded on 04/15/2011 for the course BIOL 101l taught by Professor Huddleston,m during the Fall '08 term at University of Hawaii, Manoa.

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Chapter11 - Gregor Mendel Chapter 11 Mendelian Genetics...

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