Traits, Phenotypes, and Genotypes. To help understand polygenic traits, explanation of traits, phenotypes, and genotypes is necessary. A trait is any feature of an organism, such as eye color.A phenotype is the set of an organism’s physical characteristics. For example, a person’s hair color, skin color, and eye color are all part of their phenotype.
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Polygenic traits are those traits that are controlled by more than one gene. Such traits may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of polygenic traits. Skin color is another polygenic trait for humans and a variety of other animals.
Instead, polygenic traits exhibit incomplete dominance so the phenotype displayed in offspring is a mixture of the phenotypes displayed in the parents. Each of the genes that contributes to a polygenic trait, has an equal influence and each of the alleles has an additive effect on the phenotype outcome.
A polygenic trait refers to any inheritable trait that iscontrolled by multiple genes, and each of these genes can havemultiple alleles. For example, eye color in humans is a polygenictrait.
The most crucial thing to the understanding of polygenic traits and genetic variance are definitions of traits, phenotypes, and genotypes as well as Mendelian inheritance. Traits You have probably heard the term “trait” in association with describing someone and this is close to the definition of the term.
Polygenic means influenced by multiple genes. Cystic fibrosis is a single gene disorder, in which a mutation occurs in one gene that specifies cystic fibrosis, in this case CFTR gene.
Definition of polygenic in the AudioEnglish.org Dictionary. Meaning of polygenic. What does polygenic mean? Proper usage of the word polygenic. Information about polygenic in the AudioEnglish.org dictionary, synonyms and antonyms.
Chapter 11: Human Genetics study guide by omgmangoes includes 129 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades.