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We integrate contemporary knowledge of signal transduction pathways with principles of quantitative and population genetics to characterize genetic networks underlying complex traits , using a model founded upon one - way functional dependency of downstream genes on upstream regulators ( the principle of hierarchy ) and mutual functional dependency among related genes ( functional genetic units , FGU ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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