What is true about multiple alleles?
Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles for a gene in a diploid organism. When there is a gene existing in more than two allelic forms, this condition is referred to as multiple allelism.
What are multiple alleles answer?
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.
Which of the following is an example of multiple alleles?
An example of multiple alleles is the ABO blood-type system in humans. In this case, there are three alleles circulating in the population.
Which of the following statement is true if there are multiple alleles for a gene?
1. If there are multiple alleles for a gene which of the following is true? Explanation: If a gene has multiple allele then there are varied dominance recessive relations but ultimately one organism has only 2 of these multiple alleles and the relation among them determines the phenotype.
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.
How do multiple alleles occur?
Multiple alleles exist in a population when there are many variations of a gene present. … In both haploid and diploid organisms, new alleles are created by spontaneous mutations. These mutations can arise in a variety of ways, but the effect is a different sequence of nucleic acid bases in the DNA.
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 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 does it mean to have multiple alleles quizlet?
Terms in this set (5)
Multiple Alleles. – When three or more alleles control a trait. Example. Blood Types in humans.
Which of the following is an example of polygenic inheritance multiple alleles?
Polygenic Inheritance: Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three “dominant” capital letter genes (A, B and C) control dark pigmentation because more melanin is produced.
What is an example of multiple alleles trait 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)|
What is multiple Allelism explain with 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.
Which statement is correct for incomplete dominance?
In incomplete dominance, the variants (alleles) are not expressed as dominant or recessive; rather, the dominant allele is expressed in a reduced ratio.
How can multiple alleles provide many different phenotypes for a single trait?
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 are the three alleles responsible for ABO blood system?
The ABO locus has three main allelic forms: A, B, and O. The A and B alleles each encode a glycosyltransferase that catalyzes the final step in the synthesis of the A and B antigen, respectively.