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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Textbook Question
Chapter 18, Problem 11SQ
Molecular clocks are based on comparisons of the number of ______ mutations between species.
- a. lethal
- b. neutral
- c. conservative
- d. nonconservative
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Luria & Delbruck's fluctuation test demonstrated that _________________.
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By comparing DNA sequence of a specific gene, we can determine the evolutionary relationship of two organisms. Based on the sequence listed below, which two species would you expect to be more closely related? Organism No.1 with ATG CAA TAC GCC, organism No. 2 with ATG CAT GAC ACC and organims No. 3 with ATG CAT TAC GCC
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Chapter 18 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Prob. 1SQCh. 18 - Which of the following assumptions is not part of...Ch. 18 - Prob. 3SQCh. 18 - Prob. 4SQCh. 18 - In a cladogram, each node represents a(n) _______...Ch. 18 - Constructing a cladogram _______ . a. may involve...
Ch. 18 - In cladograms, sister groups are _______ . a....Ch. 18 - Through ______, a body part of an ancestor is...Ch. 18 - Homologous structures among major groups of...Ch. 18 - Prob. 10SQCh. 18 - Molecular clocks are based on comparisons of the...Ch. 18 - Prob. 12SQCh. 18 - All of the following data types can be used as...Ch. 18 - Choose the statement that is incorrect. a....Ch. 18 - Prob. 15SQCh. 18 - Match the terms with the most suitable...Ch. 18 - In the late 1800s, a biologist studying animal...Ch. 18 - The photos shown above illustrate a case of...Ch. 18 - Bonobas and chimpanzees are sister groups. Humans,...
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- Which of the following organisms would be the most likely to have identical copies of the Alu sequence, repeated thousands of times in its genome? A. the Japanese pufferfish B. Escherichia coli C. the chimpanzee D. Fugu rubripes E. the mousearrow_forwardWhen we compare DNA sequences among individuals, we tend to see lots or differences In non-coding regions of the genome but very few differences in coding regions, particullarly at second codon position in exons. What explains these different levels of nucleotide diversity? A. Selection on coding regions B. Selection on non-coding regions C. Different mutation rates in coding and non-coding regions D. Protien folding patterns E. all the abovearrow_forwardWhich of the following is not true of a single nucleotide polymorphism?a. It is usually caused by a translocation mutation.b. It is usually caused by a nucleotide substitutionmutation.c. It may change the phenotype of an organism.d. It is inherited from parent to offspring.arrow_forward
- The basic units of information that encode the proteins needed to grow and function as a living organism are called: Select one: a. Chromosomes O b. Genes c. Mutations O d. Cells O e. Mendel's postulatesarrow_forwardIn humans, mutations can be the result of _________________. * A. racial discrimination B. political intervention C. exposure to harmful level of radiation D. migration pattern 2. Which of the following causes a decreasing wildlife population in most of the places in our country? * A. loss of limiting factor B. loss of natural disturbances C. loss of habitat D. loss of carrying capacityarrow_forwardThe above image compares portions of DNA containing globin genes from an ordinary bony fish and an icefish. The genes on the figure are aligned based on - A. the beginning sequence on the chromosome. B. a matching of intron sequences. C. homologous sequences. D. gene function.arrow_forward
- The experimental insertion of a fragment of frog DNA into a bacterial plasmid produces a(n) ________ molecule; if this fragment contains a gene, the process is most accurately referred to as ________. a.recombinant; gene cloning b. diploid; splicing c. Hybrid; fusion d.Eukaryo-bacterial; genetic engineering e. Mutant; biosynthesisarrow_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_forward1arrow_forward
- Modern dogs are direct descendants of the gray wolf. They first appeared about 130,000 years ago. Today, there are about 150 different breeds of domestic dog, a few of which are shown below. 1. Gray wolf All modern domestic dogs are descendants of the gray wolf. adapted from: www. pba.org The great variety of modern dogs can best be explained by A. selective breeding of dogs over many years B. the cloning of domestic dogs C. genetic alterations in gray wolves alive today D. natural selection favoring wolves over dogsarrow_forwardCertain species of blind fish living in perpetual darkness in the ocean depths have evolved from ancestors that could see. Research indicates that the brain centers for vision in these fish is degenerating, whereas the brain centers controlling other senses are enlarging. What might be the MOST probable reason for the loss of vision in these fish? O A. exposure to mutagens that caused the loss of vision B. progressive selection of genetic variants in the population leading to blindness as an evolutionary adaptation C. infection by cave-dwelling microorganisms that has led to degeneration of the eyes O D. extreme high pressure at the ocean depths causing a deterioration of visionarrow_forwardWhat observations are consistent with the conclusion that DNA serves as the genetic material in eukaryotes? Select the four correct statements. a. DNA content and ploidy in various cell types( sperm and somatic cells) are related b. DNA is found to be the only macromolecule in eukaryotes that has different subunits. c. Gene transfer is a direct evidence as it has been facilitated by recombinant DNA techniques. d. The correlation of the action and absorption spectra of ultraviolet light support the interpretation that DNA is a genetic material. e. DNA is shown to be present in ribosomes, matrix, and nucleus, where genetic function is performed. f. DNA is shown to be present in mitochondria, chloroplasts, and nucleus, where genetic function is performed.arrow_forward
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY