why A1 allele become not fixed in the population when the A2 allele is still present in this population?
Some allele which are deleterious and harmful to organism which carry them can be eliminated by natural selection as those individual will be dead due to expression of this allele and allele can't pass in next generation if individual die before reproducing.
Another allele which can pass in next generation due to reproduction of that organism, will still present in population.
why A1 allele become not fixed in the population when the A2 allele is still present in...
Question 2: In an outbreeding diploid population, an autosomal locus has two alleles, A1 and A2. You observe the allele frequencies of A1 and A2 are both equal to 0.5, and the relative fitnesses of the three genotypes (A1A1, A1A2, and A2A2) are equal to 2, 1.5, and 1, respectively. A) Which allele will become fixed in this population? (1 point) **The recessive beneficial allele A2A2 will eventually become fixed in the population (A2A2=1) B) What is the allele frequency...
A mainland population of 1000 blue iguanas have the neutral alleles A1 and A2 with frequencies of A1 = 0.50 and A2 = 0.50. A new population of blue iguanas is founded on Lizard Island with a population size of 10 males and 15 females. The neutral alleles A1 and A2 are present in the population with frequencies of A1 = 0.30 and A2 = 0.70. Migrants begin moving from the mainland to Lizard Island at a rate of 1...
p is the frequency of a new mutation: -i.e. In a population containing only allele A2, an allele mutates into allele A1 Question: A single mutant allele A2 would start at p=0.1 in a population with ____ (how many) individuals? A.) 10 B.) 5 C.) 20
In a population of mice, there are two alleles of the A locus (A1 and A2). Tests showed that in this population there are 300 mice of genotype A1A1, 200 of A1A2 and 250 of A2A2. What is the frequency of the A2 allele in the population? (enter as decimal- with zero & rounded to nearest hundredth)
4. Say we have a population, with Ne = 100, containing two alleles, A1 and A2 at frequencies 0.6 and 0.4, respectively. We leave this population alone for 10000 generations (keeping its size constant), then come back to find that the allele frequencies are still 0.6 and 0.4. a) Explain why this would be evidence that selection is acting in this population. b) Which genotype would you expect to have the highest fitness in this case? Explain.
1. We're considering a fully recessive, deleterious (harmful) mutation (A2) at an allele frequency of q = 0.01 (one percent) in a large outbreeding population. Thus p(A1) = 0.99.1. What is the population frequency of A2A2 homozygotes? 2. What is the population frequency of A1A2 heterozygotes? 3. Of all the A2 alleles in the population, what proportion are in heterozygotes? 4. And what proportion are in homozygotes? 5. Now, your country starts a policy of sterilizing all the affected individuals...
An allele, A1, in a diploid population of size N, starts at an allele frequency of 0.7. What is the expected allele frequency in the next generation? In the 100thgeneration? What is the probability that the allele frequency will increase in the next generation? If you follow 100 populations that start with the same conditions for millions of generations, how many would you expect to be fixed for A1?
QUESTION 18 Consider three cases of selection at a dialleic locus with alleles A1 and A2: Relative Fitnesses A2A2 A IAI A142 A2A2 - AIA A142 1242 AZAZ 1 0 .7 0.7 10.9 0.7 Initial Freq. of A1 -0.01; Generations - 500: Population size - Infinite. Al other conditions set to zero. Run the above model in the Alleel program Why does case 1 take so long to start to increase in frequency? Because natural selection can only act on...
A gene has four alleles, A1, A2, A3, and A4. The alleles occur in a population at the following frequencies: A1=0.2, A2=0.1, A3=0.4, A4=0.3. Compute the following: a) Probability that a single allele chosen at random is either A1 or A4 b) Probability than an individual as two A1 alleles c) Probability that an individual has one A1 and one A3 allele d) Probability that an individual is NOT A1A1 e) Probability that if we drew two individuals at random,...
Assume that the allele frequencies of alleles A1 and A2 were 0.2 and 0.8 in one subpopulation and 0.4 and 0.6 in another subpopulation. Assuming that there are Hardy-Weinberg proportions within each subpopulation and that the subpopulations are of equal size, what would be the observed heterozygosity if these populations were lumped? How does this compare to what would be expected if there were one random-mating population?? Calculate the same values for the three heterozygotes when the subpopulations had frequencies...