Start studying Polygenic Inheritance. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Start studying Polygenic Inheritance (10.3). Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Polygenic inheritance refers to a single characteristic that is controlled by more than two genes (also called multifactorial inheritance) Polygenic inheritance patterns normally follow a normal (bell-shaped) distribution curve - it shows continuous variation
With polygenic inheritance when two or more genes control the expression of a phenotype, many possible phenotypes can exist As amount of genes that control one trait increase, the number of phenotypes increase to a point where it is impossible to determine the genotype by just observing the phenotype
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In polygenic inheritance, multiple alleles and genes contribute to a phenotype. The trend toward increased height and weight due to improved nutrition in certain human populations is an example of the effect of ________ on phenotypes.
Polygenic inheritance can be explained as Mendelian inheritance at many loci, resulting in a trait which is normally-distributed. If n is the number of involved loci, then the coefficients of the binomial expansion of ( a + b ) 2n will give the frequency of distribution of all n allele combinations .
Examples of polygenic inheritance in humans include height, eye color and skin color. Physical traits that have polygenic inheritance are influenced by more than one gene and typically display a continuous distribution, such as a range of heights. Polygenic traits do not have the classic phenotypic ratios of Mendalian inheritance.
Polygenic Inheritance Definition. Polygenic inheritance, also known as quantitative inheritance, refers to a single inherited phenotypic trait that is controlled by two or more different genes.. In a system which differs from Mendelian Genetics, where monogenic traits are determined by the different alleles of a single gene, polygenetic traits may display a range of possible phenotypes ...
Polygenic inheritance is a type of incomplete dominance inheritance, where the expressed phenotypes are a mixture of inherited traits. Polygenic traits have a bell-shaped distribution in a population with most individuals inheriting various combinations of alleles and falling within the middle range of the curve for a particular trait.