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Genetic drift may occur when a small group of individuals colonizes a new habitat. These individuals may carry alleles in different relative frequencies than did the larger population from which they came.
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What kinds of landforms would you be most likely to find in an earthquake zone?
The Panama Canal
What kinds of things are you more likely to observe in a rural setting than the city?
A slower pace
What circumstances that genetic drift occur?
Genetic drift is the fluctuation of allele frequencies in a population due to chance. Chance plays a role in several ways. Copies of alleles can be lost because they never make it into gametes. Another possibility is, if the allele copy makes into a sperm, that sperm isn't the one that fertilizes an egg. Maybe the organism that carries copies of the allele in its gametes fails to find a mate, or is killed before reproducing. These kinds of events can influence the frequency of that alelle in a population, and occurs regardless of any selection for or against that allele. Obviously, the smaller the population, the larger the effect drift has on the allele frequency. For example, consider a population of four organisms. Each has two copies of a particular gene (one on each chromosome). Now, consider a mutation that creates a new allele for that gene, and that it appears on one chromosome of one individual. That allele will have a frequency of 1/8 in that population, so if it is lost, the frequency change will be 1/8. Now imagine a population of eight individuals; the frequency of the new allele would be 1/16, so if it was lost, the change in frequency would be less than in a population of four. It should therefore be easy to see that the effect of genetic drift on allelic frequency change is dramatically less in very large populations. In fact, in an essentially infinite population, genetic drift would have a negligible effect on the frequency of an allele. Another factor that can influence allele frequency, and which is a part of genetic drift is non-random mating. If an organism does not have an equal probability of mating with any other organism in a population, then some alleles will increase or decrease in frequency simply due to that. For instance, if a population exists over a large geographic range, individuals that live closer to each other have a greater probability of mating than those who live far apart. Species who employ reproductive strategies such as leks,where males gather together and compete for the privilege of mating with females are also examples of non-random mating. Lekking increases the effects of drift because it reduces what biologists call the effective population size, or the number of breeding adults. For the above reasons, when population geneticists want to study factors that affect the frequency of an allele (such as natural selection), and they want to minimize the effects of drift, they model populations that are very large (essentially infinite) and assume random mating.
The use of RFLPs for genetic fingerprinting is based on?
The use of RFLPs in generic fingerprinting is based on the ability of restriction enzymes to dissect DNA into small fragments. There are many kinds of restriction enzymes made to cut various DNA sequences.
What are the kinds modals?
kinds of modals
What kinds of populations are affected by genetic drift?
Genetic drift occurs in all finite populations. However the effects of drift are more pronounced in smaller populations than in large ones. Meanwhile, even though they are more present in smaller populations, the drifting is more likely to occur in larger populations because of the larger number of different genetic combinations present. Throughout evolution of populations, genetic drifting effects all types of population sizes, though it is more likely in larger populations but more present in smaller populations.
What does it mean different situations?
In these kinds of situations we need to involve the police. :) your welcome
What kinds of landforms do longshore currents and longshore drift produce?
what is a current
What kinds of landforms do longshore drift and longshore currents produce?
what is a current
What kinds of phenotypic are the results of evolution?
Changes that are genetic
What kinds of landforms do long shore drift and long shore currents produce?
Spits are formed when longshore drift travels past a point where the dominant drift direction and shoreline do not veer in the same direction.
What kinds of phenotype change are the result of evolution?
Changes that are genetic
What kinds of phenotype changes are the results of evolution?
Changes that are genetic
What kinds of phenotype changes are the result of evolution?
Changes that are genetic
What kinds of phenotypic change are the result of evolution?
Changes that are genetic
What kinds of of phenotype changes are the result of evolution?
Changes that are genetic
The genetic code directs the synthesis of hundreds of different kinds of?
proteins
