One problem is that the population will loose it genetic variation. With little genetic variation a population is less likely to have some individuals that will be able to adapt to a changing environment.
Genetic drift occurs over a short period of time in small isolated populations, resulting in a dramatic change in phenotype. The characteristic(s) become fixed
because the population is so small any change in gene frequency has a dramatic effect on the population as a whole.
It is hypothesized that the recessive eye and hair color(blonde and blue) that prevails in Sweden is due to genetic drift in the original population.
In a population of only 200 individuals if 50% of the population is blonde haired, the
Hardy-Weinberg Principle p squared + 2pq + q squared = 1 and p + q =1 where p is the frequency of the the dominant allele and q is the frequency of the recessive allele.
In order for the population to be 50% homozygous recessive nearly 71% of all the alleles in the population are recessive. p+q therefore is .29+.71=1 (approximate). This means that of 200 indivduals in the population 100 are blonde haired and 17 (approximate) are homozygous for dark hair and the remaining 83 (approximate) are heterozygous dark haired.
Whether genetic drift occurs because of random probability or the loss of individuals with the dominant allele through disease, accident or war the effect on the population would be dramatic.
Changing the amount of genes that it has. Therefore either deleting or adding more genes to that population
ocuurence of evolution due to variation for adapting a different conditions of the environment
genetic drift....
Random changes in allele frequency are due to genetic drift.
The sudden change in the genetic make up or genetic form of an individual is called gene mutation.
When there is low genetic variation in a population the species produced are unlikely to withstand diseases.
A genetic drift is a random change in allele frequency over time that is brought about by chances. A bottle neck is a drastic reduction in population size brought about by severe pressure.
genetic drift....
Genetic Drift
Evolution is the change in allele frequency over time in a population of organisms. By mutation, genetic drift, gene flow and natural selection.
No. Genetic mutations lead to changes in the gene. This results in a (possible) new allele. Genetic drift is the change in frequency of an allele in the population due to chance. The smaller the population the bigger the chance on genetic drift (like it is more likely to coin flip 10 heads in a row then 1000 heads) while on the other hand the bigger the population the bigger the chance new alleles will be created by mutations.
Genetic drift is considered a form of evolution. If a single population is split into two isolated groups then genetic drift will result in increasing differences over time. Eventually they will become two different species, unable to interbreed even if the two groups are brought back together.
small populations
genetic drift....
If I'm not mistaken genetic drift is the random change in the genome of a population over time. This being said it would be possible that this random changing could eventually remove certain diversity from a population.
Random changes in allele frequency are due to genetic drift.
The sudden change in the genetic make up or genetic form of an individual is called gene mutation.
Genetic drift is the random change in the frequency of alleles within a population's gene pool. It can cause the genetic composition of a population to change in one direction or another. Combined with natural selection, genetic drift is a principal force in biological evolution.Another Answer:Genetic drift is where random chance events which can effect the gene's abundance in a population, regardless of whether the gene is advantageous or not. For example, a natural disaster kills animals indiscriminately, regardless of their genetic makeup.
When there is low genetic variation in a population the species produced are unlikely to withstand diseases.