'Genetic variance' presentation slideshows

Biology 105 - Evolution Dr. Theodore Garland, Jr. 17 Nov. 2015: "Quantitative Genetics"

Biology 105 - Evolution Dr. Theodore Garland, Jr. 17 Nov. 2015: "Quantitative Genetics". Reading is pages 293-8, 318-331, 7, 43-5, 49, 179, 325-9, 667 in Bergstrom, C. T., and L. A. Dugatkin. 2012. Evolution. W.W. Norton and Company. Four Approaches for Studying Adaptation :

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STABILIZING SELECTION ON HUMAN BIRTH WEIGHT

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Quantitative trait locus (QTL) analysis: Establishing the linkage between traits and genes

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Quantitative trait locus (QTL) analysis: Establishing the linkage between traits and genes

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Chapter 18

Chapter 18. Quantitative Genetics. 13 - 18 April, 2005. Continuous variation. Overview. In nature, variation in most phenotypic characters is continuous. Such quantitative variation is studied with statistical techniques.

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Introduction to Quantitative Genetics

Introduction to Quantitative Genetics. Quantitative Characteristics. Many organisms traits are genetically influenced, but do not show single-gene (Mendelian) patterns of inheritance.

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The Relationship Between Genotype and Phenotype

24.1 Quantitative Characteristics Vary Continuously and Many Are Influenced by Alleles at Multiple Loci. The Relationship Between Genotype and Phenotype For continuous characteristics: several different genotypes produce same phenotype. Types of Quantitative Characteristics.

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Lecture 7: Inbreeding and Crossbreeding

Lecture 7: Inbreeding and Crossbreeding. Inbreeding. Inbreeding = mating of related individuals Often results in a change in the mean of a trait Inbreeding is intentionally practiced to: create genetic uniformity of laboratory stocks produce stocks for crossing (animal and plant breeding)

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NORMAL DISTRIBUTIONS OF PHENOTYPES

NORMAL DISTRIBUTIONS OF PHENOTYPES. Mice. Fruit Flies. In: Introduction to Quantitative Genetics Falconer & Mackay 1996. MEAN. VARIANCE. CHARACTERIZING A NORMAL DISTRIBUTION. Mean and variance are two quantities that describe a normal distribution.

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NORMAL DISTRIBUTIONS OF PHENOTYPES

NORMAL DISTRIBUTIONS OF PHENOTYPES. Mice. Fruit Flies. In: Introduction to Quantitative Genetics Falconer & Mackay 1996. MEAN. VARIANCE. CHARACTERIZING A NORMAL DISTRIBUTION. Mean and variance are two quantities that describe a normal distribution.

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NORMAL DISTRIBUTIONS OF PHENOTYPES

NORMAL DISTRIBUTIONS OF PHENOTYPES. Mice. Fruit Flies. In: Introduction to Quantitative Genetics Falconer & Mackay 1996. MEAN. VARIANCE. CHARACTERIZING A NORMAL DISTRIBUTION. Mean and variance are two quantities that describe a normal distribution.

383 views • 30 slides

NORMAL DISTRIBUTIONS OF PHENOTYPES

NORMAL DISTRIBUTIONS OF PHENOTYPES. Mice. Fruit Flies. In: Introduction to Quantitative Genetics Falconer & Mackay 1996. MEAN. VARIANCE. CHARACTERIZING A NORMAL DISTRIBUTION. Mean and variance are two quantities that describe a normal distribution.

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Quantitative traits

Quantitative traits. Quantitative Traits. Mendel worked with traits that were all discrete, either/or traits: yellow or green, round or wrinkled, etc. Different alleles gave clearly distinguishable phenotypes.

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Chapter 19 The Inheritance of Complex Traits

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Chapter 19 The Inheritance of Complex Traits

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Additive genetic variance and heritability

Additive genetic variance and heritability One of the most important questions we can ask to understand evolutionary change is how the phenotypes of parents and their offspring are related.

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Evolution

Evolution. Moving toward a brighter future?. Evolution. Answering some BIG questions. How do species becomes more diverse? How do some species survive environmental changes and others do not?. Evolution. Answering some smaller questions. What came first the chicken or the egg?

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Quantitative Inheritance in Plant Breeding

Quantitative Inheritance in Plant Breeding. Transgressive segregation. Plants with traits that arise by segregation of genes for a quantitative character that fall outside the range of the parents are known as transgressive segregates

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Lecture 6: Inbreeding and Heterosis

Lecture 6: Inbreeding and Heterosis. Inbreeding. Inbreeding = mating of related individuals Often results in a change in the mean of a trait Inbreeding is intentionally practiced to: create genetic uniformity of laboratory stocks produce stocks for crossing (animal and plant breeding)

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PBG 650 Advanced Plant Breeding

PBG 650 Advanced Plant Breeding. Module 5: Quantitative Genetics Genetic variance: additive and dominance. Variance and Covariance - definition. The variance of a variable X is: V( X ) = E[( X i - ? X ) 2 ] = E( X i 2 ) - ? X 2 The covariance of variable X and variable Y is:

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