Ch 11 The Basic Principles of Heredity pg 1

Ch 11 The Basic Principles of Heredity pg 1 - 1 Phenotype...

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Menden’s Principles of Inheritance I. Mendel studied inheritance A. Mendel did breeding experiment with peas in 1856 1. Mendel- applied quantitative methods to study it 2. All hybrid plants that are the offspring of genetically pure, or true breeding, parents are similar in appearance 3. When these hybrids mate with each other, they do not breed true; their offspring shows a mixture of traits. B. Organism of choice: garden pea 1. easy to grow, many varieties 2. remove anther to prevent self pollination 3. protected from other pollen sources b/c petals cover reproductive structures C. Mendel took 2 years to verify that the varieties were the true breeding lines for inherited features
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Unformatted text preview: 1. Phenotype- physical appearance of an organism a. TB line produces only offspring expressing the same phenotype, ex. Tall plants or round seeds 2. Important that Mendel worked with TB = he knew parents were homozygous for a certain trait 3. Strains chosen representing seven characters, traits are known. a. clearly contrasting phenotypes: flower, seed, and pod colors, stem height, pod shape, flower position D. Mendel’s experiments 1. P generation- crossing plants from two different TB lines with contrasting phenotypes; each pair of plants are the parental generation belong a. conclusion: each member of first generation of offspring resembled 1 of 2 parents...
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Ch 11 The Basic Principles of Heredity pg 1 - 1 Phenotype...

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