Genetic variation can be defined as the genetic makeup of organisms within a population change.Genes are inherited segments of DNA that contain codes for the production of proteins. Genes exists in alternate versions, or alleles that determine distinct traits that can be passed on from parents to offspring.
The ultimate source of genetic variability is the imperfect replication of DNA. DNA polymerase does not always incorporate the correct base when DNA...
Mutation is the ultimate source of genetic variation. In natural populations of finite size, however, mutations and the genetic variation they introduce are constantly removed by genetic drift and by purifying and stabilizing natural selection. Therefore, to understand how genetic variation is generated and maintained, one must know the rate by ...
History of the concept The concept of genetic drift was first introduced by one of the founders in the field of population genetics, Sewall Wright. His first use of the term "drift" was in 1929 ...
The ultimate sources of variation, the source of new heritable characteristics in populations and species, are due to mutation and recombination in chromosomes, genes, DNA. The frequency of a gene, or allele, in a population is due to number of forces: forces increasing variability, and forces decreasing variability.
The ultimate source of genetic variation is differences in DNA sequences. Most of those genetic differences do not affect how individuals function. Some genetic variation, however, is associated with disease, and some improves the ability of the species to survive changes in the environment.
It should be noted that mutation is the ultimate source of genetic variation in all populations—new alleles, and, therefore, new genetic variations arise through mutation. Genetic Drift Another way a population’s allele frequencies can change is genetic drift ( [Figure 1] ), which is simply the effect of chance.
It should be noted that mutation is the ultimate source of genetic variation in all populations—new alleles, and, therefore, new genetic variations arise through mutation. Genetic Drift Another way a population’s allele frequencies can change is genetic drift (Figure 11.2.1), which is simply the effect of chance.
Genetic variation comes from sex combinations and minor mutations (something minor like if you're taller than anyone else in your family - a major mutation is typically deadly to the organism or doesn't readily spread) and it's the changes in nature that "select" what traits survive.
The cliche goes: mutation is the ultimate source of all genetic variation. In my research I use experimental evolution to study the process of mutation and its consequences for fitness. Our research has shown that the mutation rate between individuals can vary up to 7-fold.