While most genes exist in two allele forms, some have multiple alleles for a trait. albino series of coat colors in rabbits, eye color in Drosophila and blood groups in man etc. A common example of this in humans is ABO blood type. Characteristics of Multiple Alleles 3. Examples 4. Multiple Alleles . Importance of Allelism. Theories of Allelism 5. Multiple alleles definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Example. Alleles may occur in pairs, or there may be multiple alleles affecting the expression of a particular trait. Characteristics of multiple alleles: 1. The combination of alleles that an organism carries constitutes its genotype . Definition of multiple alleles in the Definitions.net dictionary. If the paired alleles are the same, the organismâs genotype is said to be homozygous for that trait; if ⦠An example of multiple alleles is the ABO blood-type system in humans. Multiple alleles definition: three or more alternative forms of a particular gene existing in a population | Meaning, pronunciation, translations and examples Multiple Alleles - When three or more alleles control a trait. For example, the ABO BLOOD GROUP gene has at least six alleles. ABO blood groups - 3 different alleles (IA, IB, i) - 4 phenotypes (A, B, AB,O) - 6 Genotypes: Type A- IAIA or IAi In this case, there are three alleles circulating in the population. Meaning of multiple alleles. Medical definition of multiple allelism: the state of having more than two alternative contrasting characters controlled by multiple alleles at a single genetic locus. - Each Individual can only have 2 alleles for each trait; one from each parent. Information and translations of multiple alleles in the most comprehensive dictionary definitions resource on the web. 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 ⦠Look it up now! Multiple Alleles cont. 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. multiple allelism the occurrence of more than two ALLELES of a gene, although only two may be present together in an individual at any one time. Multiple alleles are always at the same location (locus) in the chromosome. 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. 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