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When the population is small
or
When there is no gene flow
Small population, germ line mutation, beneficial mutation that gets into many progeny and a good deal of luck.
What else can I help you with?
Under is condition would a mutation have most impact on allele frequency?
There is no gene flow.
When does a mutation have the most impact on allele frequency?
There is no gene flow - APEX
Which allele is associated with the BRCA2 mutation?
The BRCA2 mutation is associated with a variety of mutations across its gene. However, most commonly, the mutation is found in one allele of the BRCA2 gene located on chromosome 13.
Which of the following situations is most usual for a dominant allele that results in severe effects in the offspring?
The trait occurs by mutation.
What is potential impact mutation?
No one knows what effect a mutation may have. Most are not viable.
How will the allele change in the rat population?
Allele frequencies can change in a rat population through genetic drift, natural selection, gene flow, and mutations. These can lead to an increase or decrease in the frequency of certain alleles within the population over time.
What do mutations do to alleles?
Generally, gene frequency will not change significantly unless the mutation is successful and advantageous enough that it is heavily selected in the population. Since most mutations result in failure of the organism to thrive (death, reproductive failure, etc.) they have little or no effect on a population's gene frequencies. Even if the mutation has no apparent detrimental effects it will, itself remain in the population at a low frequency unless it enhances the organism's ability to reproduce within the population.
What will most likely happen if the exposure to insectisides causes mutations to a certain species over generations?
Evolution. Certain ones of the insect species will have resistance to the insecticide due to mutation and these organisms will survive and reproduce, thus conferring this resistance on to their offspring. The change in allele frequency, the definition of evolution.
What is the probability that a new allele will be lost in the next generation?
New alleles are the result of mutation. When that allele appears in the population, it is at a very low frequency, and can be lost very easily. For example, consider an allele arising in an individual. Half of his gametes will contain the allele. Therefore, his offspring (assuming, of course, he finds a mate and has any offspring at all) only have a 50% chance of carrying the allele. If he from a species with low fecundity, there is a very good possibility that none of his offspring will have the allele and it will be lost from the population. It is estimated that only 1/3 of new mutations make it into the next generation because most are lost due to chance factors.
How is mutations a basis for evolution?
Mutation serves up the variation in morphology and behavior that natural selection promotes, against the immediate environment, to better survival and, most especially, reproductive success. The organism that is selected thus has more progeny than it's conspecifics and changes the allele frequency in it's population of organisms, and this is evolution,
Does mutation depend on evolution?
The mutation theory is basically stating that mutation is one of the major factors that cause evolution. The mutation has to be a beneficial mutation, meaning that it has to help the survival of the organism that got the mutation. The mutation causes knew genes and diversity which can spread quickly throughout a population and eventually change the frequency of alleles (causes mutation) Remember the mutation has to be beneficial to the survival of the organism.
Which recessive allele most often remains on the same chromosome as A?
The recessive allele that most often remains on the same chromosome as the dominant allele A is typically referred to as the "linked recessive allele." This occurs due to genetic linkage, where two genes located close together on the same chromosome tend to be inherited together during meiosis. The degree of linkage can be influenced by factors such as recombination frequency, but alleles that are physically close on a chromosome are more likely to be passed on together.
