Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 21ESP
As mentioned in Section 9.3, mtDNA accumulates mutations at a rate approximately ten times faster than nuclear DNA. Thus geneticists can use mtDNA variations as a “molecular clock” to study
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What is the most straightforward evidence at the molecular level in support of the idea that modern humans first appeared in Africa?
The Amish community in Eastern Pennsylvania stemmed from a small closed population of around 200 individuals from Eastern Europe. Certain mutant alleles have been found at higher frequencies in the Amish relative to the general population, including a rare form of dwarfism called Ellis-Van Creveld syndrome, in which the short stature is accompanied by polydactyly. Evaluate the factors driving evolution in the Amish population. Is this form of evolution adaptive? Explain.
You compare two strands of mtDNA and discover that there are 3 differences in base pairs between them. Assuming that the mutation rate for the species that you are examining is 1 mutation every 20,000 years, how long ago did the two strands share a common ancestor? Write your answer in xxx,xxx format.
These two strands shared a common ancestor _____________ years ago.
Chapter 9 Solutions
Concepts of Genetics (12th Edition)
Ch. 9 - Chlamydomonas, a eukaryoric green alga, may be...Ch. 9 - In aerobically cultured yeast, a petite mutant is...Ch. 9 - DNA in human mitochondria encodes 22 different...Ch. 9 - Prob. 4NSTCh. 9 - Why did Marcia choose mitochondrial testing to...Ch. 9 - Marcia saw an ad on television for ancestry DNA...Ch. 9 - How much importance should we place on the results...Ch. 9 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 9 - Review the Chapter Concepts list on page 196. The...Ch. 9 - Streptomycin resistance in Chlamydomonas may...
Ch. 9 - A plant may have green, white, or green-and-white...Ch. 9 - In diploid yeast strains, sporulation and...Ch. 9 - Predict the results of a cross between ascospores...Ch. 9 - In Lymnaea, what results would you expect in a...Ch. 9 - In a cross of Lymnaea, the snail contributing the...Ch. 9 - In Drosophila subobscura, the presence of a...Ch. 9 - A male mouse from a true-breeding strain of...Ch. 9 - Consider the case where a mutation occurs that...Ch. 9 - What is the endosymbiotic theory, and why is this...Ch. 9 - In an earlier Problems and Discussion section (see...Ch. 9 - Mitochondrial replacement therapy (MRT) offers a...Ch. 9 - The specification of the anteriorposterior axis in...Ch. 9 - The maternal-effect mutation bicoid (bcd) is...Ch. 9 - (a) In humans the mitochondrial genome encodes a...Ch. 9 - Mutations in mitochondrial DNA appear to be...Ch. 9 - Researchers examined a family with an interesting...Ch. 9 - Payne, B. A. et al. (2013) present evidence that a...Ch. 9 - As mentioned in Section 9.3, mtDNA accumulates...Ch. 9 - Because offspring inherit the mitochondrial genome...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Humans carry a variety of non-functional genetic sequences, called processed pseudogenes, in their DNA. we can estimate how long ago these sequences first appeared in the genomes of our ancestors. In humans, processed pseudogenes include the three options below which would be the least widespread among other primate species a. alpha-enolase psi1 (11 million years old) b. AS PSI 7 (16 million years old) c. CALM II PSI3 (36 million years old)arrow_forwardThe following illustrations represent two different patterns of evolution. Briefly discuss the differences in these two patterns with regard to how evolutionary change (on the x axis) occurs with respect to time (on the y axis).arrow_forwardWhich of the following statements best explains the importance of sister taxa for understanding the evolution of ingroup taxa? A) The sister group informs of the likely state of the common ancestor of the ingroup. B) The sister group is composed only of ancestral characters representing a primitive taxon having ancestral states for all characters able to be studied. C) The sister group allows us to infer character state polarity in order to understand how character states have changed during evolution of the ingroup. D) A & B E) A& C F) All of the above.arrow_forward
- In the past, the evolutionary history of whales was represented by cladogram A, shown below. As you can see, whales were believed to be closely related to mesonychids, an extinct group of mammals that looked similar to wolves. Today, that cladogram has been revised, as shown in cladogram B. Which of the following statements best describes the reason for this change? A - Cladograms A and B are hypotheses that changed as new evidence became available.B - Cladogram B was revised to show a water-to-land pattern of evolution in groups of organisms.C - Cladogram B was altered to better include similarities in habitat as new information became available.D - Cladograms are organized today to show a much more simplified pattern like the one shown in cladogram B.arrow_forwardWhen I first studied hominin evolution, they had found "Lucy", an Australopithecus afarensis, and everyone thought her species was an early ancestor of Homo sapien. The picture is much more complicated, with lots of hominins living in close proximity for millions of years...much different than our now singular species. Look at the phylogenetic tree and use it as a guide to briefly describe hominin lines in Africa up to Homo. Do not discuss Homo.Just discuss a sense that you generally can grasp what was going on in Africa with our Genus for 6 or 7 million years!arrow_forwardIf mutations such as those of the Ubx gene candrastically change morphology in a single step,why do most evolutionary biologists maintainthat modification of existing traits and the evolution of novel characters have generally proceeded by successive small steps?arrow_forward
- Which of the following species would be expected to form a hybrid double-stranded DNA molecule, at the highest temperatures, when their DNA is mixed with the DNA of humans? the common chimpanzee (Pan troglodytes) the agile gibbon (Hylobates agilis) the orangutan (Pongo pygmaeus) the olive baboon (Papio anubis) the gorilla (Gorilla gorilla) The evolution of the tetraploid South African clawed toad Xenopus laevis from the diploid tropical toad Xenopus tropicalis (in a single generation) is most likely: the result of a single chromosomal duplication the result of a single chromosomal deletion the result of a single gene duplication the result of a complete genome deletion the result of a complete genome duplicationarrow_forwardWhy is molecular data for phylogenetic inference best analyzed with use of an explicit model of molecular evolution? A) This is true of morphological data, not molecular data, it is impossible to model changes in molecular sequence data because it is constantly evolving. B) Because molecular data is known to only experience random changes and is constantly evolving, a chaotic model of evolution can universally be applied to molecular sequence data for phylogenetic analysis. C) Because molecular data is known to experience non-random changes in terms of the likelihood of different types of mutations -- transitions vs. transversions, at different codon positions, which can be used to infer sequence evolution and relationship. D) None of the above.arrow_forwardIn 1979, bones found outside Ekaterinburg, Russia, were shown to be those of Tsar Nicholas and his family, who were executed in 1918 by a Bolshevik firing squad in the Russian Revolution . To prove that the skeletons were those of the royal family, mtDNA was extracted from the bone samples, amplified by PCR, and compared with mtDNA from living relatives of the tsar’s family. Q. Mitochondrial DNA from which living relatives would provide useful information for verifying that the skeletons were those of the royal family?arrow_forward
- Mitochondrial DNA evidence has shown that____. a. the greatest diversity of mtDNA is in European peoples, suggesting they share a more recent origin b. the least diversity of mtDNA is in African peoples, suggesting Old World peoples share a more ancient origin c. the greatest diversity of mtDNA is in African peoples, suggesting they share a more ancient origin d. the least diversity of mtDNA is in European peoples, suggesting they share a more ancient originarrow_forwardA number of comparisons of nucleotide sequences among hominidsand rodents indicate that inbreeding may have occurredmore often in hominid than in rodent ancestry. Bakewell et al.(2007. Proc. Nat. Acad. Sci. [USA] 104: 7489-7494) suggest thatan ancient population bottleneck that left approximately 10,000 humans might have caused early humans to have a greaterchance of genetic disease. Why would a population bottleneckinfluence the frequency of genetic disease?arrow_forwardHow does the aminoacyl trna synthetases recognize which trna gets its amino acid? Define compare and contrast and give examples of natural selection and the impact on allele frequencies through mechanisms such as stabilizing selection directional selection and disruptive selection?In the human brain a great deal of synaptic pruning occurs in early childhood?arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
The Evolution of Populations: Natural Selection, Genetic Drift, and Gene Flow; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SRWXEMlI0_U;License: Standard YouTube License, CC-BY
The Evolution of Humans | Evolution | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=Vf_dDp7drFg;License: Standard YouTube License, CC-BY