In a gene pool there are many different alleles that a species can have. When many alleles exist for the same gene, the most common phenotype or genotype among a population is denoted as the wild-type. It is often abbreviated, in genetic shorthand, as “+”. Wild-type is considered the standard or norm.
When many alleles exist for the same gene?
There are traits in humans and other organisms that have three or more different types of alleles (genes). When a trait has three or more distinct alleles, we refer to it as having multiple alleles inheritance. The human ABO blood type alleles/trait is an example of a trait with multiple alleles.
Is wild-type recessive or dominant?
The wild-type allele is intermediate in the dominance hierarchy: it appears recessive in combination with a yellow allele, but dominant in combination with a black allele.
Is wild-type allele similar to dominant allele?
dominant allele In a heterozygous condition, the allele that is expressed. recessive allele In a heterozygous condition, the allele that is not expressed. wild type An individual having the normal phenotype; that is, the phenotype generally found in a natural population of organisms.
What is the most common phenotype?
The name given to most common phenotype in a natural population is wild type. Wild-type normally refers to the gene or trait which is normally found in populations that are in natural conditions.
Is blonde hair a genotype or phenotype?
A person with a genotype of “Bb” will not have blonde hair, even though they have an allele for that trait; this is because blonde hair is a recessive trait, and recessive traits are not expressed (or shown) in an organism’s phenotype if a dominant trait is coded by their genotype.
What are the 3 alleles for blood type?
The four main blood groups A, B, AB, and O are controlled by three alleles: A, B, and O. As humans are diploid, only two of these can be present in any one genotype. In other words, only two of these alleles are present at the same time in a person’s cell.
What are multiple alleles examples?
Two human examples of multiple-allele genes are the gene of the ABO blood group system, and the human-leukocyte-associated antigen (HLA) genes. The ABO system in humans is controlled by three alleles, usually referred to as IA, IB, and IO (the “I” stands for isohaemagglutinin).