CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 53, Problem 53.2CR
Suppose one population has an r that is twice as large as the r of another population. What is the maximum size that both populations will reach over time, based on the exponential model?
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Students have asked these similar questions
Use the Hardy–Weinberg principle to solve problems involving populations.
Recall that for an exponentially changing population
N = Noet
And the doubling time is how long it takes for the population to double in size. If you have a
population with r =0.046 , what is the doubling time?
Suppose a population has two alleles at a particular locus, and individuals with different diploid genotypes at this locus have
different probabilities of survival and expected offspring, as given in the table below:
Genotype
Percent surviving to adulthood
Expected offspring
GG
90%
11
Gg
80%
15
g8
50%
28
Calculate the absolute fitness, W, for each genotype, and then the relative fitness, w, using the smallest absolute fitness value
as your reference.
Assume that the selection differential s is equal to the difference between the relative fitness values for the heterozygote (Gg)
genotype and the genotype with the lowest fitness. (That is, s WG Wiowest ) If there are 410 individuals who are
homozygous for the G allele in a population of 1,177, and we ignore the effect of genetic drift, how much should the
frequency of the G allele change over one generation of natural selection?
Note that this asking for an overall size of change - you should report a value greater than 0. Compute your…
Chapter 53 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 53.1 - DRAW IT Each female of a particular fish species...Ch. 53.1 - Prob. 2CCCh. 53.1 - Prob. 3CCCh. 53.2 - Explain why a constant per capita rate of growth...Ch. 53.2 - Prob. 2CCCh. 53.2 - Prob. 3CCCh. 53.3 - Explain why a population that fits the logistic...Ch. 53.3 - WHAT IF? Given the latitudinal differences in...Ch. 53.3 - Prob. 3CCCh. 53.4 - Identify three key life history traits, and give...
Ch. 53.4 - Prob. 2CCCh. 53.4 - Prob. 3CCCh. 53.5 - Prob. 1CCCh. 53.5 - WHAT IF? Suppose you were studying a species that...Ch. 53.5 - Prob. 3CCCh. 53.6 - How does a human population's age structure affect...Ch. 53.6 - How have the rate and number of people added to...Ch. 53.6 - WHAT IF? Type "personal ecological footprint...Ch. 53 - Gray whales (Eschrichtius robustus) gather each...Ch. 53 - Suppose one population has an r that is twice as...Ch. 53 - Prob. 53.3CRCh. 53 - Prob. 53.4CRCh. 53 - Density-dependent factors regulate population...Ch. 53 - The human population is no longer growing...Ch. 53 - Population ecologists follow the fate of same-age...Ch. 53 - A population's carrying capacity (A) may change as...Ch. 53 - Scientific study of the population cycles of the...Ch. 53 - Analyzing ecological footprints reveals that (A)...Ch. 53 - Based on current growth rates, Earth's human...Ch. 53 - The observation that members of a population are...Ch. 53 - According to the logistic growth equation...Ch. 53 - During exponential growth, a population always (A)...Ch. 53 - Which of the following statements about human...Ch. 53 - Prob. 10TYUCh. 53 - EVOLUTION CONNECTION Contrast the selective...Ch. 53 - Prob. 12TYUCh. 53 - Prob. 13TYUCh. 53 - WRITE ABOUT A THEME: INTERACTIONS In a short essay...Ch. 53 - SYNTHESIZE YOUR KNOWLEDGE Locusts (grasshoppers in...
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- Suppose a population has two alleles at a particular locus, and individuals with different diploid genotypes at this locus have different probabilities of survival and expected offspring, as given in the table below: Genotype % Surviving to adulthood Expected offspring GG 90% 11 Gg 80% 15 gg 50% 28 Calculate the absolute fitness, W, for each genotype, and then the relative fitness, w, using the smallest absolute fitness value as your reference. Assume that the selection differential s is equal to the difference in relative finesses of the heterozygote, Gg, genotype, and the least-fit genotype. If there are 311 individuals who are homozygous for the G allele in a population of 4,659, and we ignore the effect of genetic drift, how much should the frequency of the G allele change over one generation of natural selection? (Give your answer up to four decimal places).arrow_forwardSuppose a population has two alleles at a particular locus, and individuals with different diploid genotypes at this locus have different probabilities of survival and expected offspring, as given in the table below: Genotype Percent surviving to adulthood Expected offspring GG 90% 11 Gg 80% 15 gg 50% 28 Calculate the absolute fitness, W, for each genotype, and then the relative fitness, w, using the smallest absolute fitness value as your reference. Assume that the selection differential s is equal to the difference in relative fitnesses of the heterozygote, Gg, genotype and the least-fit genotype. If there are 311 individuals who are homozygous for the G allele in a population of 4,659, and we ignore the effect of genetic drift, how much should the frequency of the G allele change over one generation of natural selection? (Note that this asking for an overall size of change – you should report a value greater than 0. Compute your answer up to four decimal places.)arrow_forwardWhat assumptions must be met for a population to be in Hardy– Weinberg equilibrium?arrow_forward
- What factors in a population would mean that the Hardy-Weinberg principle does not apply? Give an example to illustrate your answer.arrow_forwardThe calculated chi-square value which is 0 is less than the critical value which is 5.991 (under the degree of freedom 2). What is the probability of the computed chi-square value? And is it part of the population in Hardy-Weinberg equilibrium?arrow_forwardA hypothetical population of 10,000 humans has 6840 individuals with the blood type AA, 2860 individuals with blood type AB and 300 individuals with the blood type BB. If the next generation contained 25,000 individuals, how may individuals would have BB blood type, assuming the population is in Hardy-Weinberg equilibrium? Express as a whole number.arrow_forward
- In a given population on a distant planet, there are 20 red, 25 orange, and 15 yellow creatures. Use Hardy-Weinberg equations and a chi square analysis to determine whether or not this population is in Hardy-Weinberg equilibrium. Show all work. Be sure to state a null hypothesis and explain your conclusion.arrow_forwardWhich of the following variables from the concept of Hardy Weinberg Equilibrium would you need to calculate for in order to figure out the frequency of the population of carriers in a region? P^2 Q^2 P*Q None of the abovearrow_forwardConsider a population of wildflowers, some with yellow flowers and some with red flowers. In this species, flower color is determined by a single gene – plants with the RR genotype have red flowers, while plants with the Rr or rr genotypes have yellow flowers. Suppose that the population is 863 plants altogether, and 369 are red. (The rest are yellow.) If the population is in Hardy-Weinberg equilibrium, how many of the plants would you expect to be carrying two copies of the r allele (i.e., how many should be rr homozygotes)?arrow_forward
- Use the provided x2 table below to determine whether this population is in HWE at the M locus (c) What is the P value that corresponds to this Chi-square (X2) value? (d) is the population in HWE? (e) Mention 3 reasons why most populations are not in Hardy-Weinberg equilibrium.arrow_forwardWhy is the Hardy Weinberg principle often violated in real populations? Justify your answers with different examples.arrow_forwardAssume that the frequency of gene B in a hypothetical population Is 0.63, that there are only two alleles (B and b) of the gee in the population, that allele B is dominant over allele b, that neither allele has a selective advantage over the other, and that the population is at equilibrium with regard to this particular gene. What is the expected frequency of the b allele in this population, based upon the Hardy-Weinberg formula? A. 0.29 B. 0.14 C.0.21 D.0.40 E.0.37arrow_forward
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