Alleles
Alleles (Greek allelon – is mutual, each other; synonyms: genes are allelic, allels) – forms of a condition of the same gene which occupy identical loci of homologous chromosomes and cause phenotypical distinctions of individuals.
Allocate:
- Dominant alleles – are equally shown in hetero - and a homozygous state and interfere with manifestation of other alleles of this gene at heterozygotes;
- Alleles lethal (synonym: flew) – cause death of an organism carrier;
- Multiple alleles – alleles of one gene which arise because of mutations and differ on the manifestation;
- Alleles unstable – are characterized by high mutability, i.e. mutating much more often than the average level of natural mutations;
- Alleles normal (synonyms: plus alleles, alleles of wild type) – usually dominant which cause development of a sign characteristic of the majority of the individuals making natural populations of a certain species;
- Recessive alleles – are shown only in a gemizigotny or homozygous state;
- Alleles sublethal – considerably reduce viability of organisms carriers.
At regular visit of a sunbed the chance to develop a carcinoma cutaneum increases by 60%.
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Section: Articles about health
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