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If the paired alleles are the same, the organism’s genotype is said to be homozygous for that trait; if … 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! A multiple allele trait is when there are more than two alleles that are present in a population. Example. 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 . Multiple alleles definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. albino series of coat colors in rabbits, eye color in Drosophila and blood groups in man etc. In this case, there are three alleles circulating in the population. Meaning of multiple alleles. Alleles may occur in pairs, or there may be multiple alleles affecting the expression of a particular trait. 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. ABO blood groups - 3 different alleles (IA, IB, i) - 4 phenotypes (A, B, AB,O) - 6 Genotypes: Type A- IAIA or IAi Characteristics of Multiple Alleles 3. What does multiple alleles mean? 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. Characteristics of multiple alleles: 1. Information and translations of multiple alleles in the most comprehensive dictionary definitions resource on the web. Examples 4. For example, the ABO BLOOD GROUP gene has at least six alleles. Multiple alleles are always at the same location (locus) in the chromosome. 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 … Multiple Alleles cont. Definition of multiple alleles in the Definitions.net dictionary. 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 - When three or more alleles control a trait. A common example of this in humans is ABO blood type. Importance of Allelism. Theories of Allelism 5. - Each Individual can only have 2 alleles for each trait; one from each parent. Multiple alleles is a series of three or more alternative forms of same gene occupying a single locus on the chromosome, e.g. Multiple Alleles . Meaning of Multiple Alleles 2. 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