Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 27.5, Problem 1COMQ
Gene flow depends on
a. migration.
b. the ability of migrant alleles to be passed to subsequent generations.
c. genetic drift.
d. both a and b.
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Gene flow occurs
a. when individuals within a population interbreed.
b. as a result of genetic drift.
c. as a result of mutations in one population but not in another.
d. when an individual migrates between two otherwise isolated populations of a species.
Define
a. mutation
b. natural selection
c. founder effect
d. bottleneck
e. gene flow
f. nonrandom mating
Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives on acidic soil, another on basic soil. b. Mallard and pintail ducks mate at different times of the year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two species of jimsonweed always die before reproducing. e. Pollen of one kind of pine tree cannot fertilize another kind.
Chapter 27 Solutions
Genetics: Analysis and Principles
Ch. 27.1 - A gene pool is a. all of the genes in a single...Ch. 27.1 - 2. In natural populations, most genes...Ch. 27.1 - A gene exists in two alleles designatedDandd. If...Ch. 27.1 - Prob. 4COMQCh. 27.2 - Which of the following is a factor that, by...Ch. 27.3 - 1. Darwinian fitness is a measure...Ch. 27.3 - 2. Within a particular population, darkly colored...Ch. 27.3 - 3. A population occupies heterogeneous...Ch. 27.3 - Prob. 4COMQCh. 27.4 - 1. Genetic drift is
a. a change in allele...
Ch. 27.4 - 2. Which of the following influences on genetic...Ch. 27.5 - Gene flow depends on a. migration. b. the ability...Ch. 27.6 - 1. Inbreeding is sexual reproduction between...Ch. 27.7 - The mutation rate is a. the likelihood that a new...Ch. 27.7 - 2. The transfer of an antibiotic resistance gene...Ch. 27.7 - Prob. 3COMQCh. 27 - 1. What is the gene pool? How is a gene pool...Ch. 27 - Prob. 2CONQCh. 27 - Prob. 3CONQCh. 27 - Prob. 4CONQCh. 27 - The termpolymorphismcan refer to both genes and...Ch. 27 - Prob. 6CONQCh. 27 - For a gene existing in two alleles, what are the...Ch. 27 - 8. In a population, the frequencies of two...Ch. 27 - The ability to roll your tongue is inherited as a...Ch. 27 - What evolutionary factors can cause allele...Ch. 27 - What is the difference between a neutral and an...Ch. 27 - Prob. 12CONQCh. 27 - Prob. 13CONQCh. 27 - Describe the similarities and differences among...Ch. 27 - 15. Is each of the following examples due to...Ch. 27 - Prob. 16CONQCh. 27 - Prob. 17CONQCh. 27 - 18. A group of four birds flies to a new location...Ch. 27 - 19. Describe what happens to allele frequencies as...Ch. 27 - With regard to genetic drift, are the following...Ch. 27 - When two populations frequently intermix due to...Ch. 27 - Two populations of antelope are separated by a...Ch. 27 - Prob. 23CONQCh. 27 - 24. Using the pedigree shown here, answer the...Ch. 27 - A family pedigree is shown here. A. What is the...Ch. 27 - 26. A family pedigree is shown here.
A. What is...Ch. 27 - Prob. 27CONQCh. 27 - Prob. 28CONQCh. 27 - 1. You will need to be familiar with the...Ch. 27 - You will need to refer to question 2 in More...Ch. 27 - Prob. 3EQCh. 27 - Prob. 4EQCh. 27 - You will need to refer to question 2 in More...Ch. 27 - Prob. 6EQCh. 27 - Prob. 7EQCh. 27 - In the Grants study of the medium ground finch, do...Ch. 27 - 9. A recessive lethal allele has achieved a...Ch. 27 - Among a large population of 2 million gray...Ch. 27 - In a donor population, the allele frequencies for...Ch. 27 - Prob. 12EQCh. 27 - Prob. 13EQCh. 27 - Prob. 14EQCh. 27 - 15. What would you expect to be the minimum...Ch. 27 - Discuss examples of positive and negative...Ch. 27 - Discuss the role of mutation in the origin of...Ch. 27 - Prob. 3QSDC
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- If reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.arrow_forwardWhich of the following is an example of gene flow? a. horizontal gene transfer b. sexual selection c. genetic drift d. mutationarrow_forwardWhich of the following is the mutation rate? a. the likelihood that a new mutation will occur in a given gene. b. too low to substantially change allele frequencies in a population. c. lower for mutations that create beneficial alleles. d. All of the above are true of the mutation rate.arrow_forward
- A chance event occurs that causes a population to lose some individuals (they died); hence, a loss of alleles in the population results froma. mutation.b. migration.c. selection.d. genetic drift.arrow_forwardDefine gene mutation Group of answer choices A. the process whereby organisms better adapted to their environment tend to survive and produce more offspring. B. the introduction of genetic material (by interbreeding) from one population of a species to another, thereby changing the composition of the gene pool of the receiving population C. variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. D. A rare and random change in a gene that can be bad or benef icial depending on the environment .arrow_forwardThe mutation rate is a. the likelihood that a new mutation will occur in a given gene. b. too low to substantially change allele frequencies in a population. c. lower for mutations that create beneficial alleles. d. All of the above are true of the mutation rate.arrow_forward
- 1) In allopatric speciation, geographic separation of two populations a.reduces the relative fitness of hybrid offspring. b.is sufficient for speciation to occur. c.allows gene flow between them. d.inhibits gene flow between them.arrow_forwardA small number of animals moves away from a large ancestral population on the continental mainland and colonizes an island. Which of the following is likely to occur? A. Genetic diversity will decrease on the mainland, because of a population bottleneck. B. Alleles that were more rare on the mainland are likely to become more common on the island, because of the founder effect. C. Genetic diversity will be lower on the island than the mainland, because of the founder effect. D. Mutations rates will increase on the island, in response to selection pressures in the new environment.arrow_forward1. Over time, the climate of an island became drier, which resulted in changes to the populations of various island finch species. Finch populations with a certain beak shape thrived, while those not having that beak shape decreased. Which of the following describes a necessary condition for these changes in the finch populations to occur? A. fewer mutations B. limited food resources C. limited beak variations D. overproduction of offspringarrow_forward
- Adaptation can best be described as A. The change in the genetic characteristics of a population of organisms over time B. Evolutionary changes on a large scale C. Gives us Genotype frequency of a population that is not evolving D. Any feature of the organism that leads to improvement in performance in the environmentarrow_forwardWhich of the following is NOT a correct statement regarding the neutral-mutation explanation for the high levels of genetic variation? A. Most genetic variation observed is adaptively neutral. B. Natural selection plays a lesser role in maintaining genetic variation. C. When natural selection occurs it leads to a decrease in genetic variation. D. Genetic variation is maintained mainly via the random effects of genetic drift.arrow_forwardWhich of the following might occur in the same geographic area but actually be an example of micro-allopatry? A. A population of moths that becomes polymorphic for mating pheromones B. Jumping spiders in which a new mutation leads some males to do a novel mating dance to attract females C. Chromosomal duplication in a plant that reproductively isolate it D. Flightless aphids where a mutation leads a portion of the population to specialize on a different food plantarrow_forward
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