Table of Contents
- 1 What is a trait controlled by multiple alleles?
- 2 Do multiple alleles determine blood type?
- 3 What is an example of a multiple allele?
- 4 What are multiple alleles and what is an example of a gene with multiple alleles?
- 5 How are polygenic traits and multiple alleles different?
- 6 What is multiple alleles give an example?
- 7 What is multiple alleles explain in brief with suitable example?
- 8 What do you mean by multiple alleles explain with example?
- 9 When are there multiple alleles for a trait?
- 10 When is multiple allelism observed in a population?
- 11 How are the A and B alleles expressed?
What is a trait controlled by multiple alleles?
A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color. In that case one gene has more than two alleles. An example of multiple alleles is blood type.
Do multiple alleles determine blood type?
An excellent example of multiple allele inheritance is human blood type. Blood type exists as four possible phenotypes: A, B, AB, & O. There are 3 alleles for the gene that determines blood type….
| GENOTYPES IAIA IAi | RESULTING PHENOTYPES Type A Type A |
|---|---|
| IBIB IBi | Type B Type B |
| IAIB | Type AB |
| Ii | Type O |
What traits are likely to be controlled by multiple genes?
Polygenic inheritance occurs when one characteristic is controlled by two or more genes. Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin color, eye color and weight. Polygenes exist in other organisms, as well.
What is an example of a multiple allele?
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).
What are multiple alleles and what is an example of a gene with multiple alleles?
In biology, multiple alleles are three or more alleles for a particular gene. Multiple allelism (biology definition): The condition of the presence of multiple alleles. An example of multiple alleles is the ABO blood group system in humans.
What is the difference between multiple alleles and multiple genes?
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. Hence, in blood type, there is one gene but three alleles.
How are polygenic traits and multiple alleles different?
What is multiple alleles give an example?
Multiple alleles among humans 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. Three distinct alleles exist: allele A (IA), allele B (IB), and allele i (IO or i).
What is an example of multiple alleles traits What are the alleles that control that 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) |
|---|---|
| ii | O |
| IAIB | AB |
What is multiple alleles explain in brief with suitable example?
In humans, the ABO blood groups are controlled by a gene called gene ‘I’. It has three alleles, namely IA, IB and i. Dominance: The alles IA and IB are dominant over the allele i. Multiple allelism: Since the blood grouping is governed by more than two alleles, it is a good example of multiple allelism.
What do you mean by multiple alleles explain with 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 is the difference between traits that are determined by multiple alleles and polygenic traits?
The main difference between multiple alleles and polygenic traits is that multiple alleles are involved in the determination of a single trait by complete dominance or codominance whereas polygenic traits determine a particular trait in a population by codominance or incomplete dominance of each polygene.
When are there multiple alleles for a trait?
Ans: Multiple Allelism is a condition in which three or more alleles of a particular gene are present on the same homologous chromosome, producing different types of phenotypes and genotypes. For e.g., the blood group system in humans. Q.5. What does it mean when there are Multiple Alleles for a trait?
When is multiple allelism observed in a population?
Multiple allelism can be observed only during population studies. Multiple Allelism: Development in a Population In diploid organisms, each organism has the ability to express two alleles at the same time. The alleles can be either the same (called homozygous genotype) or different (called heterozygous genotype).
How are alleles passed from parent to offspring?
ABO blood types exist as three alleles, which are represented as (IA, IB, IO). These multiple alleles are passed from parent to offspring such that one allele is inherited from each parent.
How are the A and B alleles expressed?
The A allele and the B allele are equal in their dominance and will be expressed equally if they are paired together into the genotype I A I B. Neither the A allele or the B allele is dominant over each other, so each type is expressed equally in the phenotype giving the human an AB blood type. Scoville, Heather.