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Most of the population is wiped out by a volcano and then repopulates the area.
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∙ 15y ago
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Could you define Minor and major allele frequency?
A minor allele is the allele that has the least frequency among all the alleles in a given population and this has to be greater than 5%.
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.
Is ABO blood group determined by multiple alleles?
* Type A alleles could be : IAIA or IAi* Type B alleles could be : IBIB or IBi* Type AB alleles : IAIB* Type O alleles : ii
How can evolution be defined and measured by the frequency of alleles in a gene pool?
It's not gene pools that have a frequency, but allelesthat have a frequency in the gene pool.Alleles are "rival" variants for the same gene. For instance, if hair colour is coded by one gene, then brown hair may be allele A for that gene, while blonde hair is allele B for the same gene.Imagine people as being packages of genes, each containing two full sets of genes (humans are diploid, so we contain two copies of genes in all our cells - but they may be two different alleles for the same gene). Now put the contents of all those people-packages together in one pool: that's your gene pool.The more people have some trait T, coded for by allele A of gene G, the higher the number of copies of allele A will be in the gene pool. That's what's called the allele frequency.
A lack of diversity in a population could possibly cause what?
It could cause extinction !!
What evidence do scientists use to prove that evolution has occurred?
Simple example. You know hair color is under genetic control. Two types, blond ( which is recessive ) and brown ( which is dominant ) exist in our population. These two alleles are in a 75% to a 25% frequency. ( dominant to recessive ) if that frequency changed to 60% to 40% you could say that evolution had taken place. Evolution is the change in allele frequency in a population of organisms over time. ( example very simplified ) PS Scientist do not prove things. They support their work with the evidence.
What happens when a population is not evolving?
When a population is not evolving, it means that the allele frequencies within the population are remaining stable over generations. This could occur if the population is experiencing no mutations, no gene flow, no genetic drift, no natural selection, and if mating is completely random. In essence, the population is in Hardy-Weinberg equilibrium.
If natality equal to mortality what would cause the population to increase?
Immigration could cause the population to increase.
What could cause a decrease in insect population?
an increase in the spider population
Give an example of how a symbiotic relationship could cause a population crash?
An example of how a symbiotic relationship could cause a population to crash is if a disease or parasite was to spread in a population that was dense. This could result in the population dramatically decreasing in a short period of time.
What is the relationship between evolution allele frequency and population?
Consider an organism as a collection of inherited traits. Now consider each trait to be the expression of a single allele. An allele is a variant of a gene. For instance, if eye colour is coded for by a single gene, then there may be an allele A that codes for blue eyes, and an allele B that codes for brown eyes. A population gene pool, then, is the collection of all alleles present in a population of organisms from a single species. The allele frequency is the number of times a specific allele occurs in the population gene pool. For instance, the allele frequency of the brown-eye allele may be higher than the frequency of the blue-eye allele, meaning that more people have brown eyes than blue eyes, in this simplification.Evolution is measured in terms of changing allele frequencies. For instance, in our example, we could measure the number of people with blue eyes in generation one, and then measure the number again in generation one hundred. If we see a significant shift in frequency, then evolution has occurred.Nota bene: this is not how it works in reality, but it's easier to explain it in such simple terms than if I were to go into the complexities of population genetics.
What combinations of alleles could produce a trait controlled by a recessive alleles?
recessive + recessive or tt
