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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Evolution______ . a. is change in a line of descent b. is the same as natural selection c. is the goal of natural selection d. explains the origin of life
______is the original source of new alleles. a. Mutation c. Gene flow b. Natural selection d. Genetic drift
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
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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- 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_forward1A. Which of the following chemical moieties is not found in DNA? A. Phosphate group B. Deoxyribose sugar C. Multifactorial inheritance D. Purines E. Amine bonds 1B. A forest fire destroys a large swath of forest habitat, effectively isolating a small population of red-nosed rabbits within an area that escaped destruction. The remaining population will be prone to: A. Gene flow B. Natural selection C. Genetic drift D. Stabilizing selection E. Directional selectionarrow_forwardWhen a gene from one species is transferred into another species, the result is ____. a. a lethal mutation b. a hybrid animal c. a GMO d. a new species e. eugenicsarrow_forward
- How is genetic drift like natural selection? A. They both depend upon the founder effect B. Both usually bring about adaptation to the environment C. They both cause gene frequency changes D. All of these are correct Mutations are __________. A. The sole source of variation in a sexually reproducing organisms B. The ultimate source of variation in sexually reproducing organisms C. Both genetic and chromosomal in nature D. All of these are correctarrow_forwardWhat is Natural Selection? A. Inherited traits change over time. B. Organisms develop traits that allow them to survive and reproduce. C. Traits that offer and advantage/benefit will be passed on to offspring. Only A & C Only A All are correct: A, B, & C Only A & Barrow_forwardOne of the key ingredients of evolution by natural selection is variation. Within a population, evolution by natural selection will occur if there is a selective advantage of one variation over another. What are the sources of variation in living populations? Select all that apply. a random mutations to DNA when DNA replicates in reproductive cells b environmental factors that may mutate DNA in gametes c mutations in somatic cells d crossing over during meiosisarrow_forward
- Match the evolution concepts. ___ gene flow a. outcome can be interdependence ___ sexual b. changes in a population’s allele selection frequencies due to chance alone ___ extinct c. alleles enter or leave a population ___ genetic d. adaptive traits make their drift bearers better at securing mates ___ coevolution e. no more living members ___ adaptive f. burst of divergences from one radiation lineage into manyarrow_forwardIn population genetics, evolution describes how ____ change from onegeneration to the next.a. individuals c. phenotype frequenciesb. allele frequencies d. communitiesarrow_forwardMutation (a) leads to adaptive evolutionary change (b) adds to the genetic variation of a population (c) is the result of genetic drift (d) almost always benefits the organism (e) a and barrow_forward
- The reason spontaneous mutations do not have an immediate effect on allele frequencies in a large population is that: a. mutations are random events, and mutations may be eitherbeneficial or harmful. b. mutations usually occur in males and have little effect oneggs. c. many mutations exert their effects after an organism hasstopped reproducing. d. mutations are so rare that mutated alleles are greatlyoutnumbered by nonmutated alleles. e. most mutations do not change the amino acid sequence of aprotein.arrow_forwardWhich of the following statements describes an example of genetic drift?a. Allele g for fat production increases in a small population because birds with more bodyfat have higher survivorship in a harsh winter.b. Random mutation increases the frequency of allele A in one population but not inanother.c. Allele R reaches a frequency of 1.0 because individuals with genotype rr are sterile.d. Allele m is lost when a virus kills all but a few individuals and just by chance, none ofthe survivors possess allele m.arrow_forwardThe modes of natural selection differ based on how selection acts on the _____ of a population. a color b environment c genotypes d phenotypesarrow_forward
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