Biol 2203 Genetics Lecture 2 Mendelian Genetics 1-23-09 RSA

Biol 2203 Genetics Lecture 2 Mendelian Genetics 1-23-09 RSA...

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The small monastery garden used by Mendel Inheritance For a long time, general ideas of inheritance were known ie. cows give birth to cows, not horses and brown dogs usually gave birth to brown dogs Lacking was a quantitative understanding of how particular traits were passed down to their offspring
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Pea Plant - Model Experimental System Easy to grow Can be crossbred artificially Grows to maturity in one season. Easily identifiable visible features Each with two contrasting traits.
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Monohybrid Crosses Monohybrid crosses involve a single pair of contrasting traits. The original parents are the P1 generation -offspring are the F1 generation exhibit only one characteristic - dominant. Offspring arising from the self-fertilizing of F1 generation are the F2 generation In F2 6022 (3/4) of the plants exhibit the same trait as the F1 generation, and 2001 (1/4) exhibit the contrasting trait that disappeared in the F1 generation
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Monohybrid Cross In the F3 generation, 1 is pure breeding dominant; 2 are segregating and 1 is pure breeding recessive
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Mendel’s monohybrid crosses were not sex dependent. The results were the same either way. Mendel realized that this was the key to understanding the basic mechanisms of inheritance.
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Mendel’s monohybrid crosses were not sex dependent. The results were the same either way. This is called a reciprocal cross. Mendel realized that this was
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Biol 2203 Genetics Lecture 2 Mendelian Genetics 1-23-09 RSA...

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