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Start studying Polygenic Traits - Polygenic Inheritance. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
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Polygenic Traits and Sex-Linked Traits study guide by jjanuck includes 16 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades.
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To learn more about polygenic traits, review the corresponding lesson titled Polygenic Traits: Definition & Examples. This lesson will help you: Identify the importance of the Nilsson-Ehle experiment
- when a trait is controlled by more than one gene - each dominant alleles "adds" to the expression of the next dominant allele When is a trait polygenic? when there is wide variation in the trait (like height) - humans don't fall into categories: short or tall like Mendel's rules.
Polygenic traits also have dominant and recessive alleles, but so many genes play a role in an organism’s phenotype for these traits that the final result is the sum of many complex interactions. It can be hard or impossible to figure out one gene’s effect on a polygenic trait.
Polygenic traits are the characteristics of an organism that are due to more than one gene. Simple Mendelian inheritance is valid for a single gene, but most traits are caused by the influence of many genes. Polygenic traits can vary continuously and may also be influenced by environmental factors.