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Why might a harmful allele persist in a population for many generations?
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∙ 15y ago
that is what i want to know
Wiki User
∙ 15y ago
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What effect does a bottleneck have on the allele frequency of a population?
It greatly reduces the total population, which increases the effects of genetic drift on allele frequency.
A small founding population of a few hundred Europeans in North America had an unusually high frequency of an allele that causes polydactyly six fingers Many generations that followed had cases of?
The Founder Effect The founder effect is when a few individuals of a species form a new population. The gene pool composition, therefore, is not reflective of the gene pool of the original population. Think of this as a small number of people starting their own colony. This is an example of the Founder effect because Polydactyly is a dominant trait. And in a large population, it will be rare finding a person with a 6th digit. In a smaller population, however, polydactyly has a higher frequency of this allele, because the smaller the population, the higher the sensitivity for inbreeding and lower genetic variation. So, polydactyly (dominant allele) + Increase inbreeding= Higher polydactyly allele frequency.
A situation in which allele frequencies change as a result of the migration of a small subgroup of a population is know as the?
founder effect
What happens when a population is in hardy weinberg equillibrium?
You mama The allele frequency does not change.
What happens when a population is not evolving?
The hardy-Weinberg theorem is put into effect which describes an equillibrium among the individuals in a population and among the alleles that they share.
Why does selection act faster against a harmful dominant allele than a harmful recessive allele?
The harmful dominat allele has a better chance of eliminating a population.
How can a lethal allele continue to be present in a gene pool even when they are selected against?
A harmful recessive allele remains in the population because both homozygous dominant and heterozygous genotypes produce the dominant, healthy phenotype. So the heterozygous genotype keeps the harmful recessive allele in the population.
Can recessive allele able to persist if the environment does not favor it?
The recessive allele can only persist in a favorable environment. The proper environment is for two recessive alleles to exist together. Then they would function properly as if the two were a dominant allele.
What question did Hardy and Weinberg want to answer?
To determine how allele frequency changes
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.
What is allele fixation?
An allele present in all members of a population
Would a dominant allele ever return to a population?
If a population does not have a particular dominant allele, it could return to the population through the immigration of new individuals carrying the dominant allele.
What did hardy and Weinberg want to answer?
How does allele frequency change between generations?~
What question did hardy and Weinberg to answer?
How does allele frequency change between generations?~
What Is the percentage of a particular allele in a population?
Allele frequency.
What is a fixed allele.?
An allele present in all members of a population
A recessive lethal gene exists in a population and remains for several generations Which woman could have passed the recessive lethal allele to offspring but not have the disease herself?
a woman who is heterozygous for the gene
