Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 17, Problem 1SQ
Summary Introduction
Introduction: Every organism consists of genes that are made up of DNA. All organisms appear different from one another and also from their ancestors as a result of evolution. Mutation is the key for evolution and the original source for the appearance of new alleles.
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which of these is not a central rule of natural selection
a, fitness to the general health and strength of an organism
b, natural selection can only act on traits that affect reproduction
c, natural selection can't occur without population variation
d, a trait must be inherited if natural selection is to act on it
A population of bats becomes isolated after colonizing an island, developing a high incidence of a negatively-impacting recessive genetic disorder not present in the original population they diverged from, or in the bats that originally colonized the island. What is the likeliest cause?
a. Genetic drift
b. Gene flow
c. Founder effect
d. Natural selection
Evolution that results because certain genotypes have a higher reproductive success is based on
a. genetic variation. c. genetic drift.
b. natural selection. d. both a and b.
Chapter 17 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 17 - Prob. 1DAACh. 17 - Prob. 2DAACh. 17 - Prob. 3DAACh. 17 - Prob. 4DAACh. 17 - Prob. 1SQCh. 17 - A neutral mutation _______ . a. has a pH of 7.0 b....Ch. 17 - Change in allele frequency of a population is...Ch. 17 - A wild population of pea plants has two alleles...Ch. 17 - Which of the following is not part of how we...Ch. 17 - Prob. 6SQ
Ch. 17 - The persistence of sickle-cell anemia in a...Ch. 17 - ___ tends to keep populations of a species similar...Ch. 17 - Which is required for a population to evolve? a....Ch. 17 - Prob. 10SQCh. 17 - After fire devastates all of the trees in a wide...Ch. 17 - True or false? Inbreeding can increase the...Ch. 17 - The difference between sympatric and parapatric...Ch. 17 - Prob. 14SQCh. 17 - Match the evolution concepts. ____ gene flow a....Ch. 17 - Species have traditionally been characterized as...Ch. 17 - Rama the cama, a llama-camel hybrid, was born in...Ch. 17 - Two species or antelope, one from Africa, the...Ch. 17 - Prob. 4CTCh. 17 - About 70 percent of flowering plants are...
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- If a populations allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c) microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary forcearrow_forwardIf a polymorphism is found at a low frequency globally, but has a high frequency in a particular population, this indicates that: A. natural selection has shaped the distribution of that trait. B. it may have been caused by genetic drift. C. a lack of gene flow affected its distribution. D. All of the above. E. None of the above..arrow_forwardUnlike natural selection, is not related to an individual’s ability to survive and may result in offspring that are less well adapted to survive in a particular environment. (a) genetic drift (b) sexual selection (c) directional selection (d) convergent evolutionarrow_forward
- Britain’s Queen Victoria was a carrier for the allele that causes hemophilia and she passed this allele on to some of her descendants. However, there is absolutely no evidence of anyone in Queen Victoria’s ancestry having hemophilia. A-gene flow B-genetic drift C-mutation D-natural selectionarrow_forwardWhat factor results evolution of a species? A) Genetic Drift B) Gene Flow C) Natural Selectionarrow_forwardEven though Hardy and Weinburg showed that the process of random reproduction will not alter gene frequency in a population over time, in wild populations we observe that gene frequencies do change overtime so what has happened? A) sexual selection B) Evolution due to sexual selection C) none of these D) any of these E) Evolution due to genetic driftarrow_forward
- gentic drift is A. genetic change in an indivdual's lifetime b genetic change over time c. The change in genetic composition of populations over time d. Evolution that happens on a indvidualarrow_forwardA change in one or more characteristics of a population that is heritableand occurs from one generation to the next is calleda. natural selection.b. sexual selection.c. population genetics.d. evolution.e. inheritance of acquired characteristics.arrow_forwardAs a mechanism of evolution, natural selection can be most closely equated with a. random mating. b. genetic drift. c. unequal reproductive success. d. gene flow.arrow_forward
- ____tends to keep populations of a species similar to one another. a. Genetic drift c. Mutation b. Gene flow d. Natural selectionarrow_forward1. ____ occurs when allele frequencies change over generation due to random chance. a. extinction b. gene flow c. natural selection d. mutationarrow_forwardOne 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 carrow_forward
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