BS 162 1nd Edition Lecture 8 Epistasis- Standing Upon- One gene affects the action of another gene at a different locusPolygenic Inheritance- gene 1  protein- gene 2  protein- gene 3  proteinMultiple genes determine a protein and all together determine single traitExamples: height, weight, longevity, etcPolygenic traits are usually continuous (not discrete or count data)How do organisms make melanin?Tyrosine  dopa  either pheomelanin or eumelanin*pheomelanin = red/yellow*uemelanin = brown/blackPhenotypic PlasticityThe ability of an organism to change its phenotype (behavior, morphology, physiology, etc) during its lifetime occurs in response to the environment allows organisms to respond to variation in the environment might be adaptive in some contexts and not in othersThe ability to change skin color in response to the environment is a genetic trait.Phenotype = genotype + environment. Types of Inheritance Patterns- autosomal dominant- autosomal recessive- sex-linked- mitochondrial DNA – inherited from mother, can be used to track maternal lineagesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- y gene: inherited from the father, can be used to track paternal