Genetics: Analysis and Principles
5th Edition
ISBN: 9780073525341
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 26.3, Problem 1COMQ
Darwinian fitness is a measure of
a. survival.
b. reproductive success.
c. heterozygosity of the gene pool.
d. polymorphisms in a population.
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Which aspect(s) of natural selection is(are) illustrated by the figure below? Check ALL answers that apply.
A.
Variation among individuals must be genetically transmissible to the next generation.
B.
Variation must exist in a population.
C.
Variation among individuals leads to differences in lifetime reproductive success.
D.
More individuals are produced each generation than the environment can support, resulting in competition for survival.
Which of the following is the best description of sexual selection?
a.
Sexual selection is the differential reproductive success due to variation in acquiring immunity from mates.
b.
Sexual selection is the differential reproductive success due to variation in survival from social selection.
c.
Sexual selection is the differential reproductive success due to variation in acquiring mates or mating success.
d.
Sexual selection is the differential survival success due to variation in avoiding mates or mating success.
In natural populations, most genes area. polymorphic.b. monomorphic.c. recessive.d. both a and c.
Chapter 26 Solutions
Genetics: Analysis and Principles
Ch. 26.1 - A gene pool is a. all of the genes in a single...Ch. 26.1 - 2. In natural populations, most genes...Ch. 26.1 - A gene exists in two alleles designatedDandd. If...Ch. 26.1 - Prob. 4COMQCh. 26.2 - Which of the following is a factor that, by...Ch. 26.3 - 1. Darwinian fitness is a measure...Ch. 26.3 - 2. Within a particular population, darkly colored...Ch. 26.3 - 3. A population occupies heterogeneous...Ch. 26.3 - Prob. 4COMQCh. 26.4 - 1. Genetic drift is
a. a change in allele...
Ch. 26.4 - 2. Which of the following influences on genetic...Ch. 26.5 - Gene flow depends on a. migration. b. the ability...Ch. 26.6 - 1. Inbreeding is sexual reproduction between...Ch. 26.7 - The mutation rate is a. the likelihood that a new...Ch. 26.7 - 2. The transfer of an antibiotic resistance gene...Ch. 26.7 - Prob. 3COMQCh. 26 - 1. What is the gene pool? How is a gene pool...Ch. 26 - Prob. 2CONQCh. 26 - Prob. 3CONQCh. 26 - Prob. 4CONQCh. 26 - The termpolymorphismcan refer to both genes and...Ch. 26 - Prob. 6CONQCh. 26 - For a gene existing in two alleles, what are the...Ch. 26 - 8. In a population, the frequencies of two...Ch. 26 - The ability to roll your tongue is inherited as a...Ch. 26 - What evolutionary factors can cause allele...Ch. 26 - What is the difference between a neutral and an...Ch. 26 - Prob. 12CONQCh. 26 - Prob. 13CONQCh. 26 - Describe the similarities and differences among...Ch. 26 - 15. Is each of the following examples due to...Ch. 26 - Prob. 16CONQCh. 26 - Prob. 17CONQCh. 26 - 18. A group of four birds flies to a new location...Ch. 26 - 19. Describe what happens to allele frequencies as...Ch. 26 - With regard to genetic drift, are the following...Ch. 26 - When two populations frequently intermix due to...Ch. 26 - Two populations of antelope are separated by a...Ch. 26 - Prob. 23CONQCh. 26 - 24. Using the pedigree shown here, answer the...Ch. 26 - A family pedigree is shown here. A. What is the...Ch. 26 - 26. A family pedigree is shown here.
A. What is...Ch. 26 - Prob. 27CONQCh. 26 - Prob. 28CONQCh. 26 - 1. You will need to be familiar with the...Ch. 26 - You will need to refer to question 2 in More...Ch. 26 - Prob. 3EQCh. 26 - Prob. 4EQCh. 26 - You will need to refer to question 2 in More...Ch. 26 - Prob. 6EQCh. 26 - Prob. 7EQCh. 26 - In the Grants study of the medium ground finch, do...Ch. 26 - 9. A recessive lethal allele has achieved a...Ch. 26 - Among a large population of 2 million gray...Ch. 26 - In a donor population, the allele frequencies for...Ch. 26 - Prob. 12EQCh. 26 - Prob. 13EQCh. 26 - Prob. 14EQCh. 26 - 15. What would you expect to be the minimum...Ch. 26 - Discuss examples of positive and negative...Ch. 26 - Discuss the role of mutation in the origin of...Ch. 26 - Prob. 3QSDC
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- Which of the following individuals would be considered to have the greatest evolutionary fitness? a. Olympic speed skater with one child b. an overweight person with three children c. a woman who had six children, none of whom (the children) survived to adulthood d. a single mom who adopted eight childrenarrow_forwardWhat is the difference between evolution, natural selection, and artificial selection? A. Evolution is a genetic change in a population over time which can occur through natural selection. Artificial selection is the differential reproduction of individuals in a population to promote the characteristics chosen by the breeder. B. Natural selection is the change of allele frequencies in a population over time. Evolution leads to differential survival and reproduction of individuals. Artificial selection has produced domesticated animals and plants. C. Evolution is a mechanism of artificial selection. Natural selection is a form of artificial selection in which nature selects the characteristics that are most beneficial to a species. D. Artificial selection is a mechanism of evolution and is the main process of domesticating animals and plants for human use. Natural selection is the same as evolution.arrow_forwardWhich statement is correct, based on current evolutionary theory? a. Selection will favor alleles only if they are good for the species. b. Selection will favor alleles only if, on average, they increase the reproductive success of individuals who have them. c. In small populations genetic drift can be more effective than natural selection in building adaptations. d. Selection sometimes favors alleles that systematically lower the reproductive success of the individuals who have them. e. Two of the above are correct.arrow_forward
- The good genes hypothesis is a theory that explains what? a. why more fit individuals are more likely to have more offspring b. why alleles that confer beneficial traits or behaviors are selected for by natural selection c. why some deleterious mutations are maintained in the population d. why individuals of one sex develop impressive ornamental traitsarrow_forwardWhich of the following best explains the role mutations play in natural selection?A. Most mutations are negative and result in the extinction of the entire speciesB. Mutations may appear for one or two generations, but they usually disappear quickly.C. If the environment changes, an existing organism develops a mutation that will help them to survive.D. Some mutations give individuals an advantage in their environment, allowing them to survive and reproduce.D is my answer is it correct?arrow_forwardA population occupies heterogeneous environments in which the fitness of some genotypes is higher in one environment and the fitness of other individuals is higher in another environment. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.arrow_forward
- A gene exists in two alleles, and the heterozygote has the highest fitness. This situation is likely to result in a. directional selection. c. disruptive selection. b. stabilizing selection. d. balancing selection.arrow_forwardYou are studying a genetically modified mouse that produces electric blue fur, which is not a fur color observed in nature. You notice that females prefer males that have the blue fur when given a choice test for mates. This result supports which of the following models of sexual selection? a. Sexual selection for indirect benefits b. Sexual selection for direct benefits c. Sexual selection for arbitrary traits d. None of the abovearrow_forwardNatural selection works on a. individuals. b. genes. c. populations. d. species. harrow_forward
- Genetic variations in natural populations develop due to: Select one: A. random mutations of the DNA. B. changes in diet. O C. environmental catastrophies. D. changes in the environment. E. individual activities.arrow_forwardWhat is the difference between artificial selection (e.g., greyhounds that are bred for speed) and natural selection? a. In artificial selection, the genetic variation introduced into the population is limited, but in natural selection, it is not b. In artificial selection, the environment is the selective force, while in natural selection, humans are the selective force c. In natural selection, the environment is the selective force, while in artificial selection, humans are the selective force d. Unlike other species, dogs are not subject to natural selection e. Both A & Carrow_forwardAlfred Russel Wallace and Charles Darwin argued that evolution by means of natural selection involves all of the following steps except: a. variation is present in all species b. species can produce more offspring than the environment can sustain c. all individuals within a species have equal chances to improve their fitness d. those individuals that are more fit will survive and reproduce in the greatest numbers e. over time, the species will evolve as the more fit individuals replace the less fit individualsarrow_forward
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