If the paired alleles are the same, the organismâs genotype is said to be homozygous for that trait; if ⦠Meaning of Multiple Alleles: The word allele is a general term to denote the alternative forms of a gene or contrasting gene pair that denote ⦠For example, the ABO BLOOD GROUP gene has at least six alleles. Multiple Alleles cont. 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. Definition of multiple alleles in the Definitions.net dictionary. A common example of this in humans is ABO blood type. In practice it seems likely that all genes must possess many alternative alleles but these often remain undetected since no noticeable alteration of PHENOTYPE is observed. In this case, there are three alleles circulating in the population. Multiple alleles definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Meaning of multiple alleles. An example of multiple alleles is the ABO blood-type system in humans. Multiple alleles are always at the same location (locus) in the chromosome. Information and translations of multiple alleles in the most comprehensive dictionary definitions resource on the web. While most genes exist in two allele forms, some have multiple alleles for a trait. Human blood type is determined by the presence or absence of certain identifiers, called antigens, on the surface of red blood cells.Individuals with blood type A have A antigens on blood cell surfaces, those with type B have B ⦠Multiple alleles definition: three or more alternative forms of a particular gene existing in a population | Meaning, pronunciation, translations and examples Theories of Allelism 5. ABO blood groups - 3 different alleles (IA, IB, i) - 4 phenotypes (A, B, AB,O) - 6 Genotypes: Type A- IAIA or IAi Importance of Allelism. Multiple Alleles . Look it up now! albino series of coat colors in rabbits, eye color in Drosophila and blood groups in man etc. Meaning of Multiple Alleles 2. Multiple Alleles - When three or more alleles control a trait. Medical definition of multiple allelism: the state of having more than two alternative contrasting characters controlled by multiple alleles at a single genetic locus. Characteristics of multiple alleles: 1. Examples 4. Characteristics of Multiple Alleles 3. - Each Individual can only have 2 alleles for each trait; one from each parent. Example. What does multiple alleles mean? A multiple allele trait is when there are more than two alleles that are present in a population. Blood Types in humans. The combination of alleles that an organism carries constitutes its genotype . 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