How do the interactions of multiple alleles affect inheritance patterns and the expression of phenotypes?
How do the interactions of multiple genes affect inheritance patterns and the expression of particular phenotypes? Polygenic traits have multiple alleles that code for the same trait. For example, in skin color, different alleles code for different proteins which make up skin color.
How does multiple alleles affect inheritance?
Multiple alleles is a type of non-Mendelian inheritance pattern that involves more than just the typical two alleles that usually code for a certain characteristic in a species. … Other alleles may be co-dominant together and show their traits equally in the phenotype of the individual.
What is the inheritance pattern when both alleles are expressed equally in the phenotype of a heterozygous?
Codominance. Codominance occurs when both alleles are expressed equally in the phenotype of the heterozygote.
How does genotype affect phenotype?
Definitions: phenotype is the constellation of observable traits; genotype is the genetic endowment of the individual. Phenotype = genotype + development (in a given environment). … In a narrow “genetic” sense, the genotype defines the phenotype.
When more than one phenotype is influenced by the same gene?
A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.
When genes have more than two alleles that affect the trait?
The majority of human genes are thought to have more than two normal versions or alleles. Traits controlled by a single gene with more than two alleles are called multiple allele traits. An example is ABO blood type.
Multiple Allele Traits.
|Genotype||Phenotype (blood type)|