Sentence examples for variants can spread from inspiring English sources
Vaccine escape is also possible and new variants can spread rapidly [ 8– 10].
Thus, within one habitat, gene flow seems relatively unrestricted and genetic variants can spread across the entire central region.
What concerns some scientists is that the gene variant can spread freely between different kinds of bacteria, said Johnson.
Thus, the altruistic variant can spread when it is rare in the population as a whole as long as some random nonadaptive process causes it to become common in a single local group.
The variant code can spread if the invasion fitness is higher than the fitness of the established code.
In more detail, the automictic parthenogen B. atticus, although maintaining meiosis and crossing over, lacks chromosome reshuffling due to sexual reproduction: for this reason, and according to the "concerted evolution" rationale, new variants can easily spread within a single B. atticus female and her progeny (i.e. a clone of parthenogens), but cannot spread in the whole taxonomic unit.
However, if biased transmission is strong compared to mixing, this group will persist in maintaining the altruistic variant at high frequency, and altruism can spread through the population as a whole either due to the differential extinction or stepping stone processes discussed above.
The finding is of interest to biologists trying to understand the pace of human evolution because it shows how quickly a variant gene that promotes its owner's survival can spread through a population.
There's no evidence that the condition can spread to humans--like BSE, which can cause variant Creutzfeldt-Jakob disease--or to cattle (Science, 1 June, p. 1641).
If the new code variant leads to an increase in fitness of proteins translated from these genes, then the new code can spread.
