Why does multiple alleles occur?

Why can multiple alleles result?

Why can multiple alleles result in many different phenotypes for a trait? This can happen because the more allele options for a specific gene the more possible combinations and therefore possible phenotypes the organism that has that gene could inherit.

What is the main idea of 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.

Why do you receive two alleles for every gene?

Since diploid organisms have two copies of each chromosome, they have two of each gene. Since genes come in more than one version, an organism can have two of the same alleles of a gene, or two different alleles. This is important because alleles can be dominant, recessive, or codominant to each other.

Why do multiple alleles and polygenic traits produce many different phenotypes for a trait?

3. Why do multiple alleles and polygenic traits produce many different phenotypes for a trait? Multiple alleles have more options for alleles, producing more phenotypes. Polygenic traits show a continuum of traits as they are controlled by multiple genes.

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What is multiple allele system?

multiple alleles Three or more alternative forms of a gene (alleles) that can occupy the same locus. However, only two of the alleles can be present in a single organism. For example, the ABO system of blood groups is controlled by three alleles, only two of which are present in an individual.

Why crossing over does not occur in multiple allele?

In the multiple alleles, alleles are present in the same locus of the homologous chromosome. The crossing over does not occurs among the alleles of the same locus.No crossing over occurs among the multiple alleles, since the alleles are present in the same locus.

What is multiple alleles explain with the help of an example?

Multiple alleles refer to the occurrence of three or more than three alleles for a particular gene. Alleles are different or contrasting forms of a gene. For example, for the gene encoding for height, one allele can be for tallness, whereas the other can be for dwarfness.

What are multiple alleles and how do they relate to blood types?

In humans and other organisms, there are traits that have three or more different types of alleles (genes). Whenever a given trait has three or more different alleles, we say that the trait has multiple alleles. One example of a trait the has multiple alleles is the human ABO blood group trait.

What’s the concept of alleles?

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. … Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive.

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