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