1 天前 · Polymorphism, as related to genomics, refers to the presence of two or more variant forms of a specific DNA sequence that can occur among different individuals or populations. The most common type of polymorphism involves variation at a single nucleotide (also called a single-nucleotide polymorphism, or SNP).

Put simply, polymorphism is when there are two or more possibilities of a trait on a gene. For example, there is more than one possible trait in terms of a jaguar's skin colouring; they can be light morph or dark morph. Due to having more than one possible variation for this gene, it is termed 'polymorphism'.

polymorphism, in biology, a discontinuous genetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuous genetic variation divides the individuals of a population into two or more sharply distinct forms.

2022年1月13日 · Polymorphism is the occurrence of more than one kind or form of organisms of the same species that exist together in one locality. (biochemistry) Crystallization of a compound in at least two distinct forms. Etymology: Ancient Greek poly (many) + morph (form) + -ism. Compare: pleomorphism.

Polymorphisms are classified based on what happens at the level of the individual mutation in the DNA sequence (or RNA sequence in the case of RNA viruses), and what effect the mutation has on the phenotype (i.e. silent or resulting in some change in function or change in fitness).

2020年1月9日 · Genetic polymorphism refers to the occurrence of two or more genetically determined phenotypes in a certain population, in proportions that the rarest of the characteristics cannot be maintained just by recurrent mutation (a general frequency of mutation).

2022年5月15日 · A polymorphism is a genetic variant that appears in at least 1% of a population. (e.g., the human ABO blood groups, the human Rh factor, and the human major histocompatibility complex). By setting the cutoff at 1%, it excludes spontaneous mutations that may have occurred in - and spread through the descendants of - a single family.