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genetic drift |
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genetic drift: see genetics genome, or characteristic set of genes, that contains the total genetic information for an individual organism. In many familiar organisms two genes for each trait are present in each individual, and these paired genes, both governing the same trait, are called alleles. ..... Click the link for more information. . genetic driftChange in the pool of genes of a small population that takes place strictly by chance. Genetic drift can result in genetic traits being lost from a population or becoming widespread in a population without respect to the survival or reproductive value of the gene pairs (alleles) involved. A random statistical effect, genetic drift can occur only in small, isolated populations in which the gene pool is small enough that chance events can change its makeup substantially. In larger populations, any specific allele is carried by so many individuals that it is almost certain to be transmitted by some of them unless it is biologically unfavourable. |
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This novel genetic composition would make it difficult for vaccine manufacturers to keep up: After a gene drift, it can take at least four months for manufacturers to produce a new vaccine, in sufficient quantities and capable of conferring protection against a new virus subtype, WHO says. |
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Gene drift
