eleven - Quantitative Genetics ANS 3384 If H-2-0 is on the...

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Quantitative Genetics ANS 3384
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If H-2-0 is on the inside of a fire hydrant, what is on the outside? K-9-P
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Quantitative Inheritance: Definition Heredity relating to the traits for which populations exhibit a continuous array of variability and whose phenotypic expression is affected by environment and by the action of several pairs of genes
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Characteristics Q T can be measured. Many genes together confer the phenotype. Individuals with same genotype may have slightly different phenotypes due to environmental variation.
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Inheritance Quantitative traits Represented by: Phenotype = Genotype + Environment P = Additive + Dominance + Epistasis + Environment
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Additive: Independent gene effect or action. The effect of a gene independent from other gene at the same locus and effects of genes at other loci, i.e., a gene has a given plus or minus effect, regardless of which other member of the pair or allelic series may be present. Inheritance Quantitative traits
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Independent or Additive Gene Effect The effect of a gene independent of the effect of the other gene at the same locus (dominance) and the effects of genes at other loci. Each independent gene effect reflects the inherent value of a gene as we would measure it if we would consider the gene in isolation.
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Dominance: Interactions between genes at the same locus. In heterozygotes, one
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eleven - Quantitative Genetics ANS 3384 If H-2-0 is on the...

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