Campbell Biology - Modified Mstingbiology
10th Edition
ISBN: 9780321935311
Author: Reece
Publisher: PEARSON
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Chapter 21, Problem 7TYU
Summary Introduction
To analyze: The reasons for the evolution in the protein coding sequences because of the effect of the mutations.
Introduction: The sequences of proteins are diverse and are formed by the process of the translation. The mutations are present at the single positions in the amino acid sequences of the various proteins. They are caused by various processes like the gene duplication, inversion, translocation, and inversion of the loci of the genes on the chromosomes.
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New genes can arise during evolution through: (i) exonshuffling, which can alter the domain structure of proteins;(ii) duplication and divergence that generates gene families;and (iii)_______ mutations in intergenic DNA sequences.
DNA sequences can act as "tape measures of evolution". Scientists analyzing the human genome sequence were surprised to find that some regions of the human genome that are most highly conserved (similar to comparable regions in other species) don't code for proteins at all. Given what you've learned about "genes" speculate on reasons why this might be so.
Evolution accounts for the unity and diversity of life, and the continuity of life is based on heritable information in the form of DNA. In a short essay (100-150 words), discuss how the fidelity with which DNA is inherited is related to the processes of evolution. (Review the discussion of proofreading and DNA repair in Concept 16.2.)
Chapter 21 Solutions
Campbell Biology - Modified Mstingbiology
Ch. 21.1 - Describe the whole-genome shotgun approach.Ch. 21.2 - Prob. 1CCCh. 21.2 - Explain the advantage of the systems biology...Ch. 21.2 - MAKE CONNECTIONS The ENCODE pilot project found...Ch. 21.2 - MAKE CONNECTIONS In Concept 20.2, you learned...Ch. 21.3 - The best estimate is that the human genome...Ch. 21.3 - Prob. 2CCCh. 21.3 - WHAT IF? What evolutionary processes might...Ch. 21.4 - Discuss the characteristics of mammalian genomes...Ch. 21.4 - VISUAL SKILLS Which of the three mechanisms...
Ch. 21.4 - Contrast the organizations of the rRNA gene family...Ch. 21.4 - MAKE CONNECTIONS Assign each DNA segment at the...Ch. 21.5 - Describe three examples of errors in cellular...Ch. 21.5 - Explain how multiple exons might have arisen in...Ch. 21.5 - What are three ways that transposable elements are...Ch. 21.5 - WHAT IF? In 2005, Icelandic scientists reported...Ch. 21.6 - Prob. 1CCCh. 21.6 - Prob. 2CCCh. 21.6 - Prob. 3CCCh. 21 - How did the Human Genome Project result in more...Ch. 21 - What has been the most significant finding of the...Ch. 21 - Compare genome size, gene number, and gene density...Ch. 21 - Explain how the function of transposable elements...Ch. 21 - How could chromosomal rearrangements lead to the...Ch. 21 - What type of Information can be obtained by...Ch. 21 - Bioinformatics intludes all of the following...Ch. 21 - Homeotic genes (A) encode transcription factors...Ch. 21 - Prob. 3TYUCh. 21 - DRAW IT Below are the amino acid sequences(using...Ch. 21 - EVOLUTION CONNECTION Genes important in the...Ch. 21 - scientific inquiry The scientists mapping the SNPs...Ch. 21 - Prob. 7TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
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- The diagram to the right shows how tiles can be put together in different ways. How does this example relate to the role of DNA as the universal genetic material in organisms?arrow_forwardThe continuity of life is based on heritable information in the form of DNA, and structure and function are correlated at all levels of biological organization. In a short essay (100−150 words), describe how the structure of DNA is correlated with its role as the molecular basis of inheritance.arrow_forwardIn general, which of the following is expected to exhibit the lowest rate of evolutionarychange?a. Synonymous changes in amino acid–coding regions of exonsb. Nonsynonymous changes in amino acid–coding regions of exonsc. Intronsd. Pseudogenesarrow_forward
- The 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_forwardConcept 23. A gene is a discrete sequence of DNA nucleotides. This concept describes the discovery of the DNA sequencing technique that made modern biology and bioinformatics possible. The method was later used to sequence the human genome and genomes of many other organisms. This led to the accumulation of great numbers of nucleotide and protein sequences in the numerous databases. The concept 23 web page is here: http://www.dnaftb.org/23/ After reading the Concept page, answer the following questions. What was the Mendel’s definition of a gene? How was it different from the definition by Beadle and Tatum? Describe proteins based on the early sequencing efforts. What was the definition of a protein coding gene based on the genetic code? What are the beginning and ending codons of the gene’s protein coding sequence? What is the name of the method that makes use of a “defective” DNA nucleotide? After reviewing the Animation pages, answer the following…arrow_forwardselect the correct options: A) For organisms that diverged >74 mya, ignore 3rd base positions within codons because they will offer little phylogenetic information for organisms. B) use different parts ofthe genome to estimate different parts of a phylogeny C) Use only 1st base positions within codons because they increase rapidly at first, then level off as result of single subsitituions at the same sites D) Use slowly evolvong sites in the squecne, such as 2nd base positions within codonsfor analyzing the oldest relationships among organisms.arrow_forward
- Which of the following is FALSE about the human genome? a. repetitive DNA is approximately 50% of the base pairs b. less than 5% of the DNA codes for unique proteins c. many genes have introns d. The genes are all unique to humans and show no similarity to genes from other organisms.arrow_forwardThe "molecular clock" of the rate of change in a segment of DNA during evolution depends on which of the following? (select all that apply) • A process called purifying selection • Whether that DNA contains functionally important sequences • Whether the DNA can be easily sequenced • The structure of the RNA molecule produced from that DNA The rate that mutations occur in that species or type of DNA Message @ProBot ✨arrow_forwardWhat is the central dogma of molecular biology? a. DNA is the genetic material. b. Information passes from DNA directly to protein. c. Information passes from DNA to RNA to protein. d. One gene encodes only one polypeptide.arrow_forward
- If all living organisms have the same pattern, then humans would have the same genetic code as a worm because all species have the same repeated pattern, DNA could not provide the variety needed for the genetic code. Was the hypothesis supported? Be sure to explain your reasoning! (Sentence starters: “Yes, my hypothesis was supported. I know this because…” or “No, my hypothesis was not correct. It was proven to be false because…”)arrow_forwardIn the context of chemical evolution, DNA's structure is interesting because it suggests a possible copying mechanism. What about DNA's structure facilitates copying? A. The strands of the double helix are complementary. B. DNA always goes from 5' to 3'. C. It has the same number of purines and pyrimidines. D. The nitrogenous bases are located on the inside of the double helix.arrow_forwardThe raw material for evolution is random mutation. Discuss whether or not you view evolution as a random process.arrow_forward
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