will someone helpp me with my homework?!?

Question

wtf is genetic drift, i 4got my biology book at school and now i also forgot wtf genetic drift means so please someone help me out......

Answer 1

Genetic drift is the term used in population genetics to refer to the statistical drift over time of allele frequencies in a finite population due to random sampling effects in the formation of successive generations. In a narrower sense, genetic drift refers to the expected population dynamics of neutral alleles (those defined as having no positive or negative impact on fitness), which are predicted to eventually become fixed at zero or 100% frequency in the absence of other mechanisms affecting allele distributions.

Whereas natural selection describes the tendency of beneficial alleles to become more common over time (and detrimental ones less common), genetic drift refers to the fundamental tendency of any allele to vary randomly in frequency over time due to statistical variation alone, so long as it does not comprise all or none of the distribution.

Genetic drift may be modeled as a stochastic process that arises from the role of random sampling in the production of offspring. The genes of each new generation are not a simple copy of the genes of the successful members of the previous one, but rather a sampling, which includes some statistical error. Drift is the cumulative effect over time of this sampling error on the allele frequencies in the population.

Answer 2

Genetic drift is the process by which gene frequencies are changed by the chances of random sampling in small population.

Answer 3

Genetic drift
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Genetic drift is the term used in population genetics to refer to the statistical drift over time of allele frequencies in a finite population due to random sampling effects in the formation of successive generations. In a narrower sense, genetic drift refers to the expected population dynamics of neutral alleles (those defined as having no positive or negative impact on fitness), which are predicted to eventually become fixed at zero or 100% frequency in the absence of other mechanisms affecting allele distributions.

Whereas natural selection describes the tendency of beneficial alleles to become more common over time (and detrimental ones less common), genetic drift refers to the fundamental tendency of any allele to vary randomly in frequency over time due to statistical variation alone, so long as it does not comprise all or none of the distribution.

Genetic drift may be modeled as a stochastic process that arises from the role of random sampling in the production of offspring. The genes of each new generation are not a simple copy of the genes of the successful members of the previous one, but rather a sampling, which includes some statistical error. Drift is the cumulative effect over time of this sampling error on the allele frequencies in the population.

By definition, genetic drift has no preferred direction. A neutral allele may be expected to increase or decrease in any given generation with equal probability. Given sufficiently long time, however, the mathematics of genetic drift (cf. random walk) predict the allele will either die out or be present in 100% of the population, after which time there is no random variation in the associated gene. In this regard, genetic drift tends to sweep gene variants out of a population over time, such that all members of a species would eventually be homozygous for this gene. Genetic drift is opposed in this regard by genetic mutation which introduces novel variants into the population according to its own random processes.

Like selection, genetic drift acts on populations, altering the frequency of alleles (gene variations) and the predominance of traits. Drift is observed most strongly in small populations and results in changes that need not be adaptive.

Answer 4

Random fluctuations in the frequency of the appearance of a gene in a small isolated population, presumably owing to chance rather than natural selection. Also called drift

Answer 5

Genetic drift is when the specific genes of a cell become cloked as bit of waste and "drift" or are taken out of the cell. The cell then becomes a mutated cell.

Answer 6

It probably would have taken you less time to type in "Genetic Drift" in any search engine....but go to link on Wikipedia

Answer 7

i might tell that buddy that he/she is misguided. Many plant life and fungi reproduce asexually. Many invertebrates, such because of the fact the cape bee and various aphids (bugs), and a few vertebrates reproduce asexually. that's often by using partenogenesis, have been a woman produces an egg that doesn't could be fertilized to realize adulthood. there is likewise vegatative and spore duplicate.

Answer 8

I am certainly not going to do your homework for you but since you don't seem to know how to research anything on-line, I will give you this link.

http://en.wikipedia.org/wiki/Genetic_drift

Answer 9

Begin by cleaning up your language when you request help on this site. No one is impressed by your foul language.

Chow!!

Answer 10

Never heard of it, I don't know WTF it is.......