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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.
Why are most mutations in eukaryotes recessive?
Most mutations in eukaryotes are recessive because for a mutation to be expressed phenotypically, it typically needs to be present in a homozygous state. In a heterozygous individual, the presence of one normal allele usually masks the effects of the mutated allele, leading to a recessive trait.
Genetic drift is most likely to occur in?
small populations where random events can have a significant impact on allele frequencies over time.
How is a lethal allele maintained in a population?
A lethal allele is maintained in population for example when you use bug spray on cockroaches there will be at least one cockroach with an allele that protects it from the bug spray, it then breeds and the allele Is passed to it's offspring and they will also be immune to the pesticide. Those babies will most likely breed with each other when they are mature passing on the allele from both of the parents making the offspring 100% immune. It's the same concept for lethal alleles.
Why are dominant genetic disorders rare in humans?
Intuitively, natural selection should eliminate these lethal genetic disorders from the population.....However, natural selection does not act on the genotype of an individual, but on the phenotype. Many of these lethal genetic disorders are the product of two "recessive alleles" that were masked in the parents with a "dominant allele."
Under is condition would a mutation have most impact on allele frequency?
There is no gene flow.
What condition would a mutation have the most impact on allele frequency?
A mutation would have the most impact on allele frequency in a condition where it confers a significant survival or reproductive advantage, such as in situations of strong natural selection or environmental change. For example, in a population facing a new disease, a mutation that grants resistance could rapidly increase in frequency. Additionally, if the mutation leads to a drastic change in phenotype that enhances mating success, it could also quickly alter allele frequencies through sexual selection. Overall, the strength of selection pressure and the context of the environment are critical in determining the mutation's impact.
When does mutation have a most impact on Allele frequency?
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.
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.
What condition would a mutation have the most impact on allele frequency A.The population is large. B.Individuals are moving in and out of the population. C.There is gene flow. D.There is n?
A mutation would have the most impact on allele frequency in option A, where the population is large. In a large population, mutations can introduce new alleles, and if these alleles confer a selective advantage, they can spread quickly due to the reduced effects of genetic drift. In contrast, options B and C involve movement and gene flow, which can dilute the effects of mutations by mixing alleles from different populations. Option D is incomplete, but generally, smaller populations would have a more pronounced effect from genetic drift than large ones.
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,
