Mindtap Biology, 1 Term (6 Months) Printed Access Card For Solomon/martin/martin/berg's Biology, 11th
11th Edition
ISBN: 9781337393096
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 19, Problem 6TYU
The continued presence of the allele that causes sickle cell anemia in areas where falciparum malaria is prevalent demonstrates which of the following phenomena? (a) inbreeding depression (b) frequency-dependent selection (c) heterozygote advantage (d) genetic drift (e) a genetic bottleneck
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The MN blood group is of interest to population geneticists because (a) people with genotype MN cannot receive blood transfusions from either MM or NN people (b) the MM, MN, and NN genotype frequencies can be observed directly and compared with calculated expected frequencies (c) the M allele is dominant to the N allele (d) people with the MN genotype exhibit frequency-dependent selection (e) people with the MN genotype exhibit heterozygote advantage
For each of the following scenarios, decide whether a change in allele frequencies is more likely to be
caused by genetic drift or by selection:
a) A small group of spiders move to a new forest Select ]
b) Only insects that are resistant to a pesticide survive in a farmer's field
[ Select ]
c) Bark beetles kill trees with weakened immune systems
[ Select ]
d) A den of foxes is destroyed when the land is cleared for agriculture
[ Select ]
e) The slowest pigeons do not survive attacks by peregrine falcons I Select |
f) Only a few lizards are left on an meadow after a severe storm Select ]
Considering the Hardy-Weinberg theorem’s assumptions, which of the following statements is NOT correct? (Recall that there are certain assumptions that must be true in order for the Hardy-Weinberg theorem to accurately predict genotype ratios in the next generation.)a) The population must be very large so there random genetic drift will not occur.b) No natural selection can occur.c) Mating must be random.d) Individuals must migrate into and out of the population so that gene flow will occur.e) Mutations must not occur.
Chapter 19 Solutions
Mindtap Biology, 1 Term (6 Months) Printed Access Card For Solomon/martin/martin/berg's Biology, 11th
Ch. 19.1 - Define what is meant by a populations gene pool.Ch. 19.1 - Distinguish among genotype, phenotype, and allele...Ch. 19.1 - Prob. 1CCh. 19.1 - Can the frequencies of all genotypes in a...Ch. 19.1 - INTERPRET DATA In a human population of 1000, 840...Ch. 19.2 - Discuss the significance of the HardyWeinberg...Ch. 19.2 - Prob. 4LOCh. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA The genotype frequencies of a...
Ch. 19.3 - Prob. 5LOCh. 19.3 - Discuss how each of the following...Ch. 19.3 - Distinguish among stabilizing selection,...Ch. 19.3 - Which microevolutionary force leads to adaptive...Ch. 19.3 - Why is mutation important to evolution if it is...Ch. 19.3 - Which microevolutionary forces are most associated...Ch. 19.3 - Prob. 4CCh. 19.4 - Prob. 8LOCh. 19.4 - Prob. 1CCh. 19.4 - Prob. 2CCh. 19.4 - How can researchers test the hypothesis that...Ch. 19 - The genetic description of an individual is its...Ch. 19 - In a diploid species, each individual possesses...Ch. 19 - The MN blood group is of interest to population...Ch. 19 - If a populations allele and genotype frequencies...Ch. 19 - Prob. 5TYUCh. 19 - The continued presence of the allele that causes...Ch. 19 - According to the HardyWeinberg principle, (a)...Ch. 19 - Prob. 8TYUCh. 19 - Mutation (a) leads to adaptive evolutionary change...Ch. 19 - Which of the following is not true of natural...Ch. 19 - If all copies of a given locus have the same...Ch. 19 - Prob. 12TYUCh. 19 - EVOLUTION LINK Given that mutations are almost...Ch. 19 - Prob. 14TYUCh. 19 - Prob. 15TYUCh. 19 - EVOLUTION LINK Evolution is sometimes...Ch. 19 - INTERPRET DATA The recessive allele that causes...Ch. 19 - PREDICT You study males in populations of a...Ch. 19 - Prob. 19TYU
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- Suppose that frequency of a recessive phenotype, white fur color, is about 0.16 (16%) in the local squirrel population. a) What is the frequency of the recessive allele (w)? b) What is the frequency of the dominant allele (W)? c) What percentage of the local squirrel population are not white, but are carriers of the recessive white allele? A/ A/arrow_forwardA farmer performs truncation selection to try to increase the weight of peaches in his orchard. Which statement correctly describes a possible outcome of this selection? a) If peach weight is not heritable, the average weight in the next generation will increase. b) If peach weight is heritable, the average weight in the next generation will increase. c) The average peach weight will decrease due to this inbreeding. If peach weight is heritable, the average weight in the next generation will decrease.arrow_forwardFor each of the following situations, indicate if it is best explained by (A) directional selection; (B), stabilizing selection; or (C) disruptive selection. Put the correct letter (A, B, or C) in each box. a. A paleo-zoologist studying the fossils of a particular lineage of fish noticed a steady increase in the number of teeth over time; the oldest fossils had the fewest teeth, while more recent fossils had more teeth. Extant members of the same group had the most teeth. b. A population of poisonous frogs was examined. Researchers discovered that individual with lower poison levels were more likely to be preyed upon during their larval stage, while individuals with higher poison levels had decreased fertility. After measuring the poison concentrations of a large sample and graphing the results, they found most individuals were clustered around a fairly narrow band of values. c. A population of tropical fish is mostly composed of individuals with either bright yellow or bright red…arrow_forward
- If 9% of an African population is born with a severe form of sickle-cell anemia (ss), what percentage of the population will be more resistant to malaria because they are heterozygous (Ss) for the sickle-cell gene? Assume Hardy-Weinberg conditions. Submit your answer as it is. a) homozygous recessive individuals (q²) b) the recessive allele (q) c) the dominant allele (p) d) homozygous dominant individuals (p²) e) heterozygous individuals (2pq)arrow_forwardSuppose that in generation 0, the frequency of allele A1 in a population of armadillos is 0.4. In each generation, 10 percent of the individuals in that population are migrants from another population that has an allele frequency of 0.6. a) Calculate the frequency of A1 in each of the next two generations (generations 1 and 2). b) Is the change in allele frequency in generation 2 greater than, less than, or equal to the change in generation 1? How can you explain that answer? c) What will the allele frequency become in this population after many generations? I need all three parts with calculations asap!!arrow_forward1) This model shows the process of natural selection on rabbits demonstrating variation in fur color over several generations. Using the model, what most likely led to the loss of white furred rabbits in the population? 21 A) XB) 9) The white rabbits did not reproduce fast enough to survive. White was a recessive trait and therefore not passed on to any offspring. The white fur was a favorable trait but was never prevalent in the population. The rabbits with white fur had less camouflage in D) the environment and were more easily preyed on by predators. If this model continues, with no major changes to the environment,arrow_forward
- There are 25 individuals in population 1, all with genotype AA,and there are 40 individuals in population 2, all with genotypeaa. Assume that these populations are located far from eachother and that their environmental conditions are very similar.Based on the information given here, the observed geneticvariation most likely resulted from(A) genetic drift.(B) gene flow.(C) nonrandom mating.(D) directional selection.arrow_forwardThis model shows the process of natural selection on rabbits demonstrating variation in fur color over several generations. Using the model, what most likely led to the loss of white furred rabbits in the population? A) the white rabbits did not reproduce fast enough to survive B) white was a recessive trait and therefore not passed on to any offspring C) the white fur was a favorable trait but was never prevalent in the population D) the rabbits with white fur had less camouflage in the environment and were more easily preyed on by predatorsarrow_forwardThe frequency of two alleles in a gene pool is 0.24 (A) and 0.76 (a). Assume that the population is in Hardy-Weinberg equilibrium. a) Calculate the percentage of heterozygous individuals in the population. Enter your response rounded to two decimal places, do not include % sign. b) Calculate the percentage of homozygous recessive individuals in the population. Enter your response rounded to two decimal places, do not include % sign.arrow_forward
- The continued evolutionary exaggeration, across generations, of a sexual display trait (e.g., a trait used by males in attracting mates, like the peacock's tail) is most likely due to: a) stabilizing fecundity selection O b) directional sexual selection c) genetic drift d) heterozygote advantage e) directional viability selectionarrow_forwardA farmer bought a herd of 500 sheep, taken from a freely breeding population, and later found that 25 of the animals had an economically undesirable feature, crinkly-hair, caused by the recessive allele (c). Assume Hardy-Weinberg Equilibrium. a) What is the frequency of this undesirable allele in the herd? Please show all work.arrow_forwardGenerally speaking, natural selection tends to select for dominant alleles while genetic drift tends to favor recessive alleles. 1)True 2)Falsearrow_forward
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