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The allele frequencies of a population are more likely to remain unchange if?
Wiki User
∙ 13y ago
There is no evolution. Random mating, no Immigration/emigration, or, in short, Hardy-Weinberg equilibrium holds.
Wiki User
∙ 13y ago
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Are allele frequencies more likely to remain stable in large populations than in small populations?
yes
Is it likely to find natural population in hardy-weinberg equilibrium?
Allele frequency is stable
What is the significance of the Hardy Weinberg principle?
"The Hardy-Weinberg principle states that in a large randomly breeding population, allelic frequencies will remain the same from generation to generation assuming that there is no mutation, gene migration, selection or genetic drift." Clearly this is a case of perfect equilibrium in a static population under no selection pressures and with the unnatural condition of perfect replication so no mutations are introduced. It is further simplified by considering only two of the many alleles likely to be present in a population for any given gene.
What is a dominent allele?
A dominant allele is an allele that can take over a recessive allele, so if you have a dominant allele and a recessive allele, then the offspring will most likely have a dominant allele over a recessive allele. The dominant allele is expressed over the recessive allele.
If a trait shows a wide range of phenotypes it most likely is what type of allele?
single gene
When are two populations likely to have very similar allele frequencies?
If there is a large amount of genetic drift :)
Are allele frequencies more likely to remain stable in large populations than in small populations?
yes
Would a recessive allele or dominant allele be more common in population?
Dominant allele because its more likely to be received by the next generation.
When a small population separates from a larger population the allele frequencies change between the two populations. Which is event is most likely to occur from such frequent changes?
They will each become more and more different. Especially if their environments also change.They may become separate species.
What is the effect of a bottleneck on allele frequencies?
Population bottlenecks occur when the size of a population is drastically reduced, either through extinction or because of separation. When this occurs, it is reasonable to assume that the genetic cross-section of the remaining population is not identical to that of the original population. Not all individuals carry every allele present in the original population, so the remaining population will carry only a small portion of the original number of alleles. This can cause what is known as the 'founder effect'.
Defective alleles are eliminated rapidly from population if they are?
A defective allele is more likely to be eliminated from a population if it is dominant. This is because it is immediately exposed to the effects of selection, as only one copy of a dominant allele is needed for it's characteristic to be developed. If an allele is recessive it can survive in a population as it is 'hidden' from selection by the presence of the corresponding dominant allele. It will only beexposed to selectionif an individual inherits the recessive allele from both parents. If the recessive allele is rare, the chances of two individuals with the allele mating could be quite small. In this way a defective recesssive allele could survive at low levels in a population.
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.
If a trait made an organism less likely to survive and reproduce what would happen to the allele for the trait?
The allele would not be passed on to further generations, as the organism cannot reproduce. There would be a smaller population of that organism who's genetic code does not contain the allele for that particular trait.
Would a change in allele frequencies be more likely to produce microevolution or macroevolution?
A change in allele frequencies is more likely to produce microevolution, as it involves small-scale changes in the genetic makeup of a population over generations. These changes can result in adaptations to specific environments or selection pressures but do not lead to the formation of new species or higher taxonomic groups, which characterize macroevolution.
Is it likely to find natural population in hardy-weinberg equilibrium?
Allele frequency is stable
What is the significance of the Hardy Weinberg principle?
"The Hardy-Weinberg principle states that in a large randomly breeding population, allelic frequencies will remain the same from generation to generation assuming that there is no mutation, gene migration, selection or genetic drift." Clearly this is a case of perfect equilibrium in a static population under no selection pressures and with the unnatural condition of perfect replication so no mutations are introduced. It is further simplified by considering only two of the many alleles likely to be present in a population for any given gene.
What is a dominent allele?
A dominant allele is an allele that can take over a recessive allele, so if you have a dominant allele and a recessive allele, then the offspring will most likely have a dominant allele over a recessive allele. The dominant allele is expressed over the recessive allele.
