Genetics: From Genes to Genomes
Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 11, Problem 6P

Approximately 50 million SNPs have thus far been recorded after the characterization of thousands of human genomes.

a. About how many base pairs in the human genome are identical in these thousands of people?
b. Do you think that many other SNPs exist among the human population? If so, why haven’t they been found?
c. Almost all of the SNP polymorphisms found to date are biallelic; that is, among all the genomes in the population studied to date, only two possible alleles can be found (for example, A and C). Provide a rough estimate for the number of triallelic SNP loci that could be found in the same group of humans (that is, the
number of loci with three different alleles—for example, A, C, and T). At about how many loci would all four possible nucleotides be found among the human genomes studied to date?

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The human genome is approximately 3 billion basepairs in size.a. Using standard 8.5″ × 11″ paper with one-inch margins, a 12-point font size, and single-spaced lines, howmany sheets of paper printed on one side would berequired to print out the human genome?b. A ream of 500 sheets of paper is about 5 cm thick.How tall would the stack of paper with the entirehuman genome be?c. Would you want a backpack, shopping cart, or asemitrailer truck to haul around this stack?
The human genome contains more than a million copies of the Alu transposable element. Comparative genomics reveals that the Alu element is found only in the clade of mammals that includes primates, tree shrews,rodents, and rabbits. a. What does the observation that the Alu transposon is limited to this clade reveal about its origin and method of spread among species? b. At many sites in the genome, an Alu element is present in humans but absent in chimpanzees, while at many other sites an Alu element is present in chimpanzees but absent in humans. What are two hypotheses that could explain this situation? For any particular site,how could the hypotheses be distinguished?
With only one exception, the most commonly used STR loci are spread across the human genome,each on a separate chromosome.a. Why is it important to analyze STRs that are all on their own chromosomes?b. What is the exception to this? (i.e., which two loci are on the same human chromosomeand which chromosome are they on?)c. Using the UCSC Genome browser, look up the two loci that you answered in 2.b. one ata time. Include a rough hand-drawing or screenshot of the ideogram (pictograph,example below) of the chromosome and mark the approximate location of each locus.Example:d. Using your answer in 2.c. and your knowledge of the frequency of crossover events onhuman chromosomes (see chapters 5 and 6), in your opinion is the fact that these twoloci are on the same chromosome a problem for forensic genetic analysis? Explain youranswer

Chapter 11 Solutions

Genetics: From Genes to Genomes

Ch. 11 - Prob. 11PCh. 11 - The previous problem raises several interesting...Ch. 11 - You want to make a recombinant DNA in which a PCR...Ch. 11 - You sequence a PCR product amplified from a...Ch. 11 - Prob. 15PCh. 11 - The trinucleotide repeat region of the Huntington...Ch. 11 - Sperm samples were taken from two men just...Ch. 11 - Prob. 18PCh. 11 - a. It is possible to perform DNA fingerprinting...Ch. 11 - On July 17, 1918, Tsar Nicholas II; his wife the...Ch. 11 - The figure that follows shows DNA fingerprint...Ch. 11 - Microarrays were used to determine the genotypes...Ch. 11 - A partial sequence of the wild-type HbA allele is...Ch. 11 - a. In Fig. 11.17b, PCR is performed to amplify...Ch. 11 - The following figure shows a partial microarray...Ch. 11 - Scientists were surprised to discover recently...Ch. 11 - The microarray shown in Problem 25 analyzes...Ch. 11 - The figure that follows shows the pedigree of a...Ch. 11 - One of the difficulties faced by human geneticists...Ch. 11 - Now consider a mating between consanguineous...Ch. 11 - The pedigree shown in Fig. 11.22 was crucial to...Ch. 11 - You have identified a SNP marker that in one large...Ch. 11 - The pedigrees indicated here were obtained with...Ch. 11 - Approximately 3 of the population carries a mutant...Ch. 11 - The drug ivacaftor has recently been developed to...Ch. 11 - In the high-throughput DNA sequencing protocol...Ch. 11 - A researcher sequences the whole exome of a...Ch. 11 - As explained in the text, the cause of many...Ch. 11 - Figure 11.26 portrayed the analysis of Miller...Ch. 11 - A research paper published in the summer of 2012...Ch. 11 - Table 11.2 and Fig. 11.27 together portray the...Ch. 11 - The human RefSeq of the entire first exon of a...Ch. 11 - Mutations in the HPRT1 gene in humans result in at...Ch. 11 - Prob. 44P
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Mechanisms of Genetic Change or Evolution; Author: Scientist Cindy;https://www.youtube.com/watch?v=5FE8WvGzS4Q;License: Standard Youtube License