(2) . I have two populations where the selection coefficient is the same but the initial...
(2) . I have two populations where the selection coefficient is the same but the initial frequency of the dominant allele (p) differs. In one population the initial frequency of the dominant allele (p) is much smaller than the other. The population with the smaller initial p frequency will reach 80% frequency of the dominant allele ____________________________ than the one with the smaller selection coefficient.
(a) faster (fewer generations) needed for large changes in phenotype or allele frequencies in more generations.
(b) in double the number of generations
(c) slower (fewer generations) needed for large changes in phenotype or allele frequencies in the same number of generations.
(d) slower (more generations) needed for large changes in phenotype or allele frequencies in fewer generations.
(3) . I have two populations where the initial frequency of the dominant allele (p) is the same but the selection coefficient (s) differs. In one population the selection coefficient is larger than the other. The population with the larger selection coefficient will reach 80% frequency of the dominant allele ____________________________ than the one with the smaller selection coefficient.
(a) faster (fewer generations) needed for large changes in phenotype or allele frequencies in more generations.
(b) in double the number of generations
(c) slower (fewer generations) needed for large changes in phenotype or allele frequencies in the same number of generations.
(d) slower (more generations) needed for large changes in phenotype or allele frequencies in fewer generations.
Homework Answers
2) c) slower (fewer generations) needed for large changes in phenotype or allele frequencies in the same number of generations.
3) a) faster (fewer generations) needed for large changes in phenotype or allele frequencies in more generations.
Add Answer to:
(2) . I have two populations where the
selection coefficient is the same but the initial...
In the case of directional selection, if the advantageous allele (b) is recessive and a less...
In the case of directional selection, if the advantageous allele (b) is recessive and a less advantageous allele (B) is dominant: A. b will be lost in the population because the dominant allele will increase in frequency by natural selection B. b will increase in frequency at the same speed as if it was a dominant advantageous allele, because what matters is the coefficient of selection and not if the allele is dominant or recessive C. b will increase in...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and...
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and in small populations. Is this correct? Why or why not? Yes. Genetic drift is sampling error, and sampling error is unpredictable, no matter the population size. Yes. Small populations experience more sampling error, but large populations have more reproduction overall, leading to similar rates of allele frequency change. O No. In the ferret experiments, allele frequencies changed more quickly in the small populations than...
9 Populations evolve for many reasons. Suppose there is a small population of birds that have...
9 Populations evolve for many reasons. Suppose there is a small population of birds that have either brown chest feathers or yellow chest feathers, and the Question Not yet answered allele for the brown feathers is dominant. The frequencies for the two alleles in the population are approximately equal Points out of 1.00 For each event or condition described below, answer the following questions. P Flag question o What mechanism? Identify whether the event is natural selection, genetic drift, or...
Two people who are “carriers” of (heterozygous) for Tay Sachs disease marry and plan a family....
Two people who are “carriers” of (heterozygous) for Tay Sachs disease marry and plan a family. What is the probability that a child from this union will suffer from Tay Sachs disease. (Recall that this is an autosomal recessive disorder, that is, homozygous recessives have the disease.) a. Zero b. 0.25 c. 0.5 d. 0.75 e. 1.0 6. At Hardy-Weinberg equilibrium, heterozygotes are the most common genotype in the population when- a. b. c. d . p> 0.67 q>0.67 and...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
Consider two populations, I and II, with initial frequencies of q0=0.8 and q0=0.2, respectively. What are...
Consider two populations, I and II, with initial frequencies of q0=0.8 and q0=0.2, respectively. What are the change in gene frequency after one generation and its ultimate value in population I if migration occurs from population II to I at the rate of 3% every generation? How many generations of continuous migration it will take to halve the gene frequency of population I?
The Kermode Spirit bear is an alternate phenotype of the species Ursus americanus (black bear) in...
The Kermode Spirit bear is an alternate phenotype of the species Ursus americanus (black bear) in British Columbia that has striking white fur. It was determined in 2001 that a single nucleotide change from G to A results in the replacement of Tyrosine with Cysteine at codon 289 in the melanocortin 1 receptor gene (mc1r; Ritland et al. 2001 Current Biology). This allele (W2) is recessive to the wildtype allele (W1), and occurs as a novel mutation in 1 out...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozyg...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozygous dominant, 37 are heterozygous dominant, and 17 are homozygous recessive. What is the frequency of the dominant allele in the population? Show all work and record your answer as a value between O and 1 rounded to two decimal places 6. The Hardy-Weinberg principle states that allele and genotype frequencies remain constant from one generation to the...
Plase hlp answer these questions: White wool in sheep is controlled by a dominant allele R,...
Plase hlp answer these questions:
White wool in sheep is controlled by a dominant allele R, and black wool by the recessive allele r. In an isolated population of 6530 sheep, 514 are black, 4981 are heterozygous, 1035 are homozygous white. When will this population be expected to reach Hardy-Weinberg equilibrium? in the next generation in two generations it already is in equilibrium impossible to tell it will not reach equilibrium A population has the following genotypic distributions: A^M A^M...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
Q3.3. Recall the prediction: Allele frequencies change by genetic drift equally quickly in large populations and in small populations. Is this correct? Why or why not? Yes. Genetic drift is sampling error, and sampling error is unpredictable, no matter the population size. Yes. Small populations experience more sampling error, but large populations have more reproduction overall, leading to similar rates of allele frequency change. O No. In the ferret experiments, allele frequencies changed more quickly in the small populations than...
9 Populations evolve for many reasons. Suppose there is a small population of birds that have either brown chest feathers or yellow chest feathers, and the Question Not yet answered allele for the brown feathers is dominant. The frequencies for the two alleles in the population are approximately equal Points out of 1.00 For each event or condition described below, answer the following questions. P Flag question o What mechanism? Identify whether the event is natural selection, genetic drift, or...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
5. Fur colour in mice is a single gene trait controled by two alleles. In a population of 75 mice, 21 are homozygous dominant, 37 are heterozygous dominant, and 17 are homozygous recessive. What is the frequency of the dominant allele in the population? Show all work and record your answer as a value between O and 1 rounded to two decimal places 6. The Hardy-Weinberg principle states that allele and genotype frequencies remain constant from one generation to the...
Plase hlp answer these questions:
White wool in sheep is controlled by a dominant allele R, and black wool by the recessive allele r. In an isolated population of 6530 sheep, 514 are black, 4981 are heterozygous, 1035 are homozygous white. When will this population be expected to reach Hardy-Weinberg equilibrium? in the next generation in two generations it already is in equilibrium impossible to tell it will not reach equilibrium A population has the following genotypic distributions: A^M A^M...
Most questions answered within 3 hours.
-
In 1970s and 1980s, molecular biologists discovered that the
hormone testosterone, binds a receptor protein that...
asked 56 minutes ago -
january 1 2010 road catering service purchase a piece of
equipment for 58000 which is expected...
asked 1 hour ago -
Explain Mertons concept of anomie is and what the
modes of adaptation to it are?
asked 2 hours ago -
Jamie is doing a survey at her school about whether the students
feel the cafeteria food...
asked 3 hours ago -
How many liters of 0.669 M KOH will be needed to raise the pH of
0.339...
asked 5 hours ago -
A liquid of density 1270 kg/m 3 flows steadily through a pipe of
varying diameter and...
asked 6 hours ago -
Questions: What should the American executive do?
'A visiting American executive finds that a foreign subsidiary...
asked 6 hours ago -
Activity based costing was introduced as an alternative to
absorption costing.
1. Discuss using illustration the...
asked 6 hours ago -
1. You own shares of Crane DVD Company and are interested in
selling them. With so...
asked 6 hours ago -
How many grams of He are necessary to fill a balloon having a
volume of 4.5E3...
asked 6 hours ago -
The 2 patients, still in the hospital, were interviewed by a
MoH epidemiologist. The interviews revealed...
asked 6 hours ago -
An uncharged capacitor and a resistor are connected in series to
a source of emf. If...
asked 6 hours ago