Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20, Problem 32P
In Fig. 21.17, to what part of the world does Dion’s mitochondrial DNA recently trace? Do his Y chromosome and autosomal chromosomes 1–22 also trace back recently to this same region of the world? Why or why not?
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Chapter 20 Solutions
Genetics: From Genes to Genomes, 5th edition
Ch. 20 - Choose the best matching phrase in the right...Ch. 20 - When an allele is dominant, why does it not always...Ch. 20 - A population with an allele frequency p of 0.5 and...Ch. 20 - Prob. 4PCh. 20 - Which of the following populations are at...Ch. 20 - A dominant mutation in Drosophila called Delta...Ch. 20 - A large, random mating population is started with...Ch. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Two hypothetical lizard populations found on...
Ch. 20 - It is the year 1998, and the men and women sailors...Ch. 20 - Prob. 12PCh. 20 - In 1927, the ophthalmologist George Waaler tested...Ch. 20 - Prob. 14PCh. 20 - A gene has two alleles A frequency = p and a...Ch. 20 - Some people can taste the bitter compound...Ch. 20 - Androgenetic alopecia pattern baldness is a...Ch. 20 - Why is the elimination of a fully recessive...Ch. 20 - Tristan da Cunha is a group of small islands in...Ch. 20 - Small population size causes genetic drift because...Ch. 20 - Prob. 21PCh. 20 - A mouse mutation with incomplete dominance t =...Ch. 20 - In Drosophila, the vestigial wings recessive...Ch. 20 - Prob. 24PCh. 20 - You have identified an autosomal gene that...Ch. 20 - In Europe, the frequency of the CF allele causing...Ch. 20 - An allele of the G6PD gene acts in a recessive...Ch. 20 - Explain why evolutionary biologists monitor...Ch. 20 - What is the most straightforward evidence at the...Ch. 20 - In March 2013, the American Journal of Human...Ch. 20 - If you go back 40 generations into your biological...Ch. 20 - In Fig. 21.17, to what part of the world does...Ch. 20 - Predict the DNA sequences at the four nodes...Ch. 20 - A cladogram not drawn to scale for the taxonomic...Ch. 20 - As noted in Fig. 21.22, humans now living in...
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- Extranuclear inheritance often correlates with maternal inheritance.Even so, paternal leakage may occur. What is paternal leakage? If a cross produced 200 offspring and the level of mitochondrial paternal leakage was 3%, how many offspring would be expected to contain paternal mitochondria?arrow_forwardThe following pedigree shows the inheritance of a mutation that causes the mitochondrial disease MERFF. Below each individual who carries the mutation is the level of severity of the disease (mild, moderate, or severe). I mild ооо mild moderate moderate severe mild Which of the following statements likely explain this observation? (Select all correct answers.) Individual 1.1 is heteroplasmic for the mutation that causes MERFF Individual 1.1 is homoplasmic for the mutation that causes MERFF Individual 1.1 is homozygous for the mutation that causes MERFFarrow_forwardExplain the likely evolutionary origin of mitochondrial and chloroplast genomes. How have the sizes of the mitochondrial and chloroplast genomes changed since their origin? How has thisoccurred?arrow_forward
- From the pedigree in Figure 3-25, what principle can youdeduce about the inheritance of mitochondrial diseasefrom affected fathers?arrow_forwardHow many genes are in human mitochondrial DNA?arrow_forwardThe four chromosomes depicted here are Y chromosomes from men in different parts of the world. The light purple bands represent specific genesthat are identical in all four men. The red bands represent genetic mutations (M) that appeared at different times; M168 appeared about 50,000 years ago, M9 about 40,000 years ago, and M3 about 10,000 years ago. Based on whatyou have learned in this chapter, identify the geographic source of men carrying each of these chromosomes: African, Eurasian, Amerindian, and first migrants out of Africa.arrow_forward
- Geneticists study mitochondrial and Y-chromosome DNA to determine the ancestry of modern humans. Such studies have led to the emergence of mitochondrial Eve and Y-chromosome Adam, whose features above are a far-cry from an artist's interpretation of the Biblical narrative. Their progeny came to have the range of physical features now described as racial differences. How has modern genomics contributed to the debate about the validity and definition of these hypothetical parents and their descendants?arrow_forwardHow is mitochondrial DNA inherited? Compare the inheritance pattern of a mitochondrial DNA to that of a nuclear DNA.arrow_forwardA rare blinding disease that has a relation to dengenerative factors is partially penetrant. In the following pedigrees for two families, the affected symptomatic individuals (black circles and squares) have been diagnosed with this disease due to the mutation in mitochondrial DNA m.14484T>C. If III.4 is homoplasmic for m.14484T>C in hair, blood, urine and other tissues examined. What will occur with IV.7 then?arrow_forward
- Why are severe mitochondrial or chloroplast genemutations usually found in heteroplasmic cells insteadof homoplasmic cells?arrow_forwardThe pair of cats produce in their first litter together the following kittens: 3 tortoiseshell short fur females, 2 tortoiseshell long fur females, 3 ginger short fur males, and 1 ginger long fur male. From this information only (no genetic diagrams required), what evidence can you use to deduce the genetic identity of the parent cats?arrow_forwardThe fruit fly Drosophila melanogaster has about 2 x 10^8 base pairs of DNA per haploid genome, of which about 75% in nonrepeated DNA. The DNA is distributed among four pairs of homologous chromosomes, which have a total of about 5,000 visible bands when in polytene forms in the salivary gland. The number of genes initially estimated from mutational studies was also about 5,000 but recent DNA sequencing studies suggest that the gene number may be somewhat higher. a. Why was it tempting to speculate that each band corresponds to a single gene? What does this suggest about the number of different proteins Drosophila can make? Does that seem like a reasonable number to you? b. Assuming all the nonrepeated DNA is uniformly distributed in the chromosomes, how much nonrepeated DNA (in base pairs) is there in average band?arrow_forward
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