Alleles - Glossary Of Medical Terms

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Alleles - Glossary Of Medical Terms
Alleles - Glossary Of Medical Terms

Video: Alleles - Glossary Of Medical Terms

Video: Alleles - Glossary Of Medical Terms
Video: Genetics Terms 2024, March
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Alleles

Alleles (Greek allelon - mutually, each other; synonyms: allelic genes, allelomorphs) are forms of the state of the same gene, which occupy identical loci of homologous chromosomes and cause phenotypic differences in individuals.

Allocate:

  • Alleles are dominant - they are equally manifested in the hetero- and homozygous state and prevent the manifestation of other alleles of the given gene in heterozygotes;
  • Lethal alleles (synonym: flew) - cause the death of the host organism;
  • Multiple alleles - alleles of one gene that arise due to mutations and differ in their manifestation;
  • Alleles are unstable - characterized by high mutability, i.e. mutating much more often than the average level of spontaneous mutations;
  • Normal alleles (synonyms: plus-alleles, wild-type alleles) are usually dominant, which determine the development of a trait characteristic of most individuals that make up natural populations of a particular biological species;
  • Alleles are recessive - they appear only in a hemizygous or homozygous state;
  • Sub-lethal alleles - significantly reduce the viability of host organisms.

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