: an allele of a genetic locus having more than two allelic forms within a population.

What is multiple allele with example?

The major example of multiple allelism is ABO blood grouping in humans. Complete answer: Multiple alleles refer to the occurrence of three or more than three alleles for a particular gene. Allele A codes for antigen A, Allele B codes for antigen B, and Allele O codes for the absence of antigen.

What are multiple alleles class 12 biology?

Category: 12th Class. More than two alternative forms (alleles) of a gene in a population occupying the same locus on a chromosome or its homologue are known as multiple alleles.

What are alleles in biology examples?

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.

How do you describe multiple alleles?

With multiple alleles, that means there are more than two phenotypes available depending on the dominant or recessive alleles that are available in the trait and the dominance pattern the individual alleles follow when combined together.

What are multiple alleles Ncert?

Answer: More than two alternative alleles of a gene are known as multiple alleles in a population occupying the same locus on a chromosome or its homologue. Multiple alleles validate the Mendelian sequence of inheritance.

What is multiple alleles and codominant alleles?

Whenever a given trait has three or more different alleles, we say that the trait has multiple alleles. These three alleles that constitute the ABO blood group trait observe a pattern of inheritance called codominance (co-dominance).

Where are multiple alleles present?

Multiple alleles are present at the same locus as one type of chromosomes. The pairs of genes occupying a specific spot called locus on a chromosome are known as alleles.

What are alleles simple definition?

An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.

What are 2 examples of alleles?

Complete dominance The color of garden peas flowers can be either purple or white. The gene coding for this trait, responsible for producing a purple pigment, is found in two forms, allele for purple color and allele for white color. Alleles are designated by letters to describe genotypes.

What is the best definition of allele?

An allele is one of a pair of genes that appear at a particular location on a particular chromosome and control the same characteristic, such as blood type or color blindness. Alleles are also called alleleomorphs. Your blood type is determined by the alleles you inherited from your parents.

How can a gene have multiple alleles?

Multiple alleles exist in a population when there are many variations of a gene present. In organisms with two copies of every gene, also known as diploid organisms, each organism has the ability to express two alleles at the same time.

How is human blood type an example of multiple allele?

An example of multiple alleles is the ABO blood-type system in humans. In this case, the I^A and I^B alleles are codominant with each other and are both dominant over the i allele. Although there are three alleles present in a population, each individual only gets two of the alleles from their parents.

What is the difference between polygenic traits and multiple alleles?

In case of multiple alleles, the same DNA strand is involved, whereas polygenic inheritance is found on multiple DNA strands. Multiple alleles involve multiple alternate forms of a gene, while polygenic traits are regulated by a group of non-allelic genes.