: an allele of a genetic locus having more than two allelic forms within a population.
What are multiple alleles Class 12?
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 is multiple Allelism explain with an example?
More than two i.e. three alleles governing the same character is known as multiple allelism. ABO blood grouping is a good example of multiple allelism ABO blood groups are controlled by the gene I.
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.
What is multiple alleles and codominant alleles?
The key difference between codominance and multiple alleles is that codominance is expressing the effects of both alleles independently, without blending in the heterozygous state, while multiple alleles refer to the state of a trait that has more than two different alleles.
What do you mean by multiple allele explain it by giving the example of ABO blood group system in human?
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. … So, for instance, an offspring that got both IA and IB alleles will have blood type AB and that who received IOIO (or ii) would have blood type O.
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 multiple alleles give an example of human trait regulated by multiple alleles?
The best characterized example of multiple alleles in humans is the ABO blood groups, discussed in the Non-Mendelian Inheritance concept. Other human traits determined by multiple alleles would be hair color, hair texture, eye color, built, physical structures, etc.
Why is blood type multiple alleles?
An example of multiple alleles is the ABO blood-type system in humans. … In this case, the IA and IB 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 dominance and codominance?
In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.
What is codominant alleles in biology?
Codominance means that neither allele can mask the expression of the other allele. An example in humans would be the ABO blood group, where alleles A and alleles B are both expressed. So if an individual inherits allele A from their mother and allele B from their father, they have blood type AB.