3. 2. An example of multiple alleles is the ABO blood-type system in humans. Peas may be round, associated with allele R, or wrinkled, associated with allele r. In this case, three combinations of alleles (genotypes) are possible: RR, Rr, and rr. Examples of Multiple Alleles a) Blood group (ABO) in human. What is the name of the type of inheritance in which rabbits of two completely different phenotypes cross? Review 1. The I A allele codes for A molecules on the red blood cells, the I B allele codes for B molecules on the surface of red blood cells, and the i allele codes for no molecules on the red blood cells. Give examples of each. There are 3 alleles for the gene that determines blood type. An example of multiple alleles is the ABO blood-type system in humans. The RR individuals have round peas, and the rr (homozygous) individuals have wrinkled peas. The human ABO blood groups are an example of multiple alleles, and the relationship between phenotype and genotype is depicted in the figure above.There are four possible phenotypic blood types for this particular gene: A, B, AB, and O. d) Eye color in Drosophila. When more than two alleles exist in a population for a single trait. c) Coat color in rabbit. In the case of multiple alleles, a gene contains several different allele variants on the same locus of each chromosome, for example the three different alleles which control for blood type – A, B & O. How are collagen genes an exmaple of pleiotropy? The I A allele codes for A molecules on the red blood cells, the I B allele codes for B molecules on the surface of red blood cells, and the i allele codes for no molecules on the red blood cells. Blood type exists as four possible phenotypes: A, B, AB, & O. Define multiple allele traits. Epistasis is when a gene at one location (locus) alters the phenotypic expression of a gene at another locus. An excellent example of multiple allele inheritance is human blood type. b) Coat color in mice. 6. Polygenic inheritance should not be confused with the effects caused by multiple alleles. A classic example of dominance is the inheritance of seed shape in peas. Multiple Allele Inheritance. The term "multiple alleles" is used to describe when a trait is controlled by more than two alleles. Anti A and Anti B. Many genes have multiple phenotypic effects, a property called pleiotropy. Multiple Alleles, Epistasis, Pleiotropy and Polygenetic Inheritance. ... For example, a person cannot have ABo blood as it has more than two alleles. Multiple 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.. Generally, each gene comes with two different alleles. In this case, there are three alleles circulating in the population. One is a dominant allele while the other is a recessive allele. Define 'Multiple Allele Inheritance'. Multiple Allele Inheritance Student's Name Institution Affiliation Multiple Alleles According to Mendel's model, each gene consisted of only a pair of two alleles. The letters refer to two specific carbohydrate molecules on the surface of red blood cells. Compare and contrast pleiotropy and epistasis. In this case, there are three alleles circulating in the population. However, there are other special cases whereby a gene can have multiple alleles. 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