Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 19, Problem 7RQ
One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship s captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see a much higher frequency of polydactyly in the Amish population. This is an example of:
- natural selection
- genetic drift
- founder effect
- b and c
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One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see a much higher frequency of polydactyly in the Amish population. This is an example of: a. natural selection b. genetic drift c. founder effect d. b and c
Which of the following is the hypothesis that individuals who possess favorable traits are more likely to survive and reproduce than those who possess less favorable traits?
genetic drift
gene flow
mutation
natural selection
An allele with no effect on fitness arises in a population through mutation and increases in frequency due to genetic drift. This is an example of....?
Group of answer choices
neither evolution or natural selection
both evolution and natural selection
evolution only
natural selection only
Chapter 19 Solutions
Biology 2e
Ch. 19 - Figure 19.2 In plants, violet flower color (V) is...Ch. 19 - Figure 19.4 Do you think genetic drift would...Ch. 19 - Figure 19.8 In recent years, factories have become...Ch. 19 - What is the difference between micro- and...Ch. 19 - Population genetics is the study of: how selective...Ch. 19 - Which of the following populations is not in...Ch. 19 - One of the original Amish colonies rose from a...Ch. 19 - When male lions reach sexual maturity, they leave...Ch. 19 - Which of the following evolutionary forces can...Ch. 19 - What is assortative mating? when individuals mate...
Ch. 19 - When closely related individuals mate with each...Ch. 19 - What is a cline? the slope of a mountain where a...Ch. 19 - Which type of selection results in greater genetic...Ch. 19 - When males and females of a population look or act...Ch. 19 - The good genes hypothesis is a theory that...Ch. 19 - Solve for the genetic structure of a population...Ch. 19 - Explain the Hardy-Weinberg principle of...Ch. 19 - Imagine you are trying to test whether a...Ch. 19 - Describe a situation in which a population would...Ch. 19 - Describe natural selection and give an example of...Ch. 19 - Explain what a cline is and provide examples.Ch. 19 - Give an example of a trait that may have evolved...Ch. 19 - List the ways in which evolution can affect...
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- Which of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a populationarrow_forwardGalapagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are separated by about 100 km of ocean. Occasionally, individuals from either island fly to the other island to stay. This can alter the allele frequencies of the population through which of the following mechanisms? a. natural selection b. genetic drift c. gene flow d. mutationarrow_forwardImagine a population of pea plants growing in Petaluma. 50% of the gene pool is P alleles, for purple flowers and 50% is p alleles, for white flowers. How can the frequency of the alleles change in this population over generations? Select all the correct answers. Group of answer choices genetic drift natural selection mutation gene flowarrow_forward
- According to the principle of Hardy-Weinberg, which of the following will NOT change the frequencies of genotypes in a population? Select one: Genetic drift Natural selection Mutation Random matingarrow_forwardEach of the following has a better chance of influencing genotype frequencies in small populations than in large populations, but which one has the greatest influence in small populations? Group of answer choices Non-random mating Natural selection Gene flow Genetic drift Mutation PreviousNextarrow_forwardA population of birds lives on a mountain. In this population, there are red-winged birds, orange-winged birds, and blue-winged birds. A predatory snake eats more of the blue-winged birds because they are not well camouflaged on the red and orange plants that grow on the mountain. This is an example of which mechanism of evolution? Group of answer choices Gene flow Cryptic coloration Natural selection Sexual selection Genetic driftarrow_forward
- A population of plants live in a valley. In this population there are plants with red flowers, purple flowers, and blue flowers. One day there is a mudslide and all of the plants purple flowers are killed leaving only red and blue flowered plants alive in the population. This is an example of which mechanism of evolution? Group of answer choices Artificial section Gene flow Sexual selection Genetic drift Natural selectionarrow_forwardThe inhabitants of the island Tristan de Cunha all descended from one indigenous family and a few sailors. The incidence of a rare eye disorder is much higher in these islanders than in other human populations. Presumably, at least one of the original island settlers carried the allele of the trait. A-mutation B-natural selection C-gene flow D-genetic driftarrow_forward"In a population, with time the frequency of some alleles/genotypes decreases" describes... Group of answer choices Evolution by natural selection Evolution by genetic drift Any evolution Any phenotypic plasticityarrow_forward
- Which of the following is an example of genetic drift? Group of answer choices A-As global temperatures increase, alleles that confer resistance to heat become more prevalent B-Peter Parker gets irradiated and turns into Spider Man C-The American Bison was hunted almost to extinction very quickly, and only a few remained D-5% of your neighborhood moves to Canadarrow_forwardPhysical anthropologist Eva Hernandez visits the Yamomamo in Venezuela and finds that only 3 individuals in a small village of 85 people have blood type A. Her grandson, Alberto Hernandez, returns 45 years later and finds that no one in the village has type A blood. A-gene flow B-natural selection C-genetic drift D-mutationarrow_forwardImagine a population of beetles living in someone's backyard. The beetles inhabit several different areas of the backyard, including the garden, patio, and storage shed. One day, the owners spray the garden with insecticide, killing off about half of the beetle population. What effect will this have on genetic variation and what evolutionary force is this an example of? Group of answer choices Reduces variation; genetic drift Increases variation; natural selection Reduces variation; natural selection Increases variation; genetic driftarrow_forward
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