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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Textbook Question
Chapter 15, Problem 12P
The so-called hypervariable regions (HV1 and HV2) of the human mitochondrial genome are sometimes used in
a. | Under what circumstances would human mtDNA be preferable over nuclear DNA for identifying individuals? |
b. | What are the disadvantages of using mtDNA, relative to nuclear DNA, in order to identify individuals? |
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People who carry a theoretical genetic disorder (called B-disease) can be identified from a 2kb DNA sequence. People who carry this genetic disorder have a single nucleotide polymorphism that results in a change of GTATTC to GGATTC, a site that only occurs once at nucleotide number 750 in this DNA sequence. Answer the following questions based on the information provided.
(a) How can you develop a simple molecular test to identify the genetic disorder?
(b) If you have carried out the molecular test (based on the information above) on a 100 individuals and found that 24 were healthy (BB) and 26 were carriers (bb); 1) What is the ratio of heterozygous? 2) Show how can you identify the three types from the agarose gel.
Chapter 15 Solutions
Genetics: From Genes to Genomes
Ch. 15 - Match each numbered item with the most closely...Ch. 15 - Assuming human cells have on average 1000...Ch. 15 - Reverse translation is a term given to the process...Ch. 15 - The human nuclear genome encodes tRNAs with 32...Ch. 15 - The human mitochondrial genome includes no genes...Ch. 15 - How do you know if the halibut you purchased at...Ch. 15 - Is each of these statements true of chloroplast or...Ch. 15 - Suppose you are characterizing the DNA of a...Ch. 15 - An example of a gene-targeting DNA plasmid vector...Ch. 15 - Which of the following characteristics of...
Ch. 15 - The Saccharomyces cerevisiae nuclear gene ARG8...Ch. 15 - The so-called hypervariable regions HV1 and HV2 of...Ch. 15 - Suppose a new mutation arises in a mitochondrial...Ch. 15 - Describe at least two ways in which the...Ch. 15 - Why are severe mitochondrial or chloroplast gene...Ch. 15 - Suppose you are examining a newly found plant...Ch. 15 - A form of male sterility in corn is inherited...Ch. 15 - Plant breeders have long appreciated the...Ch. 15 - A mutant haploid strain of Saccharomyces...Ch. 15 - Prob. 20PCh. 15 - What characteristics in a human pedigree suggest a...Ch. 15 - The first person in the family represented by the...Ch. 15 - In 1988, neurologists in Australia reported the...Ch. 15 - If you were a genetic counselor and had a patient...Ch. 15 - Kearns-Sayre syndrome KSS, Pearson syndrome, and...Ch. 15 - Many clinically relevant mitochondrial diseases...Ch. 15 - Leigh syndrome is characterized by psychomotor...Ch. 15 - All mutations in mitochondrial genes ultimately...Ch. 15 - How could researchers have determined that the...
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- Assuming human cells have on average 1000 mitochondria, what percentage by weight of the total DNAisolated from human tissue would be mtDNA?arrow_forwardThe cells of many eukaryotic organisms have highly specialized systems that specifically repair G–T mismatches in DNA. The mismatch is repaired to forma G≡C (not A=T) base pair. This G–T mismatch repair mechanism occurs in addition to a more general system that repairs virtually all mismatches. Suggest why cells might require a specialized system to repair G–T mismatches.arrow_forwardBy average, how many Sau3A (5’GATC3’) sites are there in a 10 kd DNA molecule? (1/4)^6 * 10,000 = 2.44140625 => 2.4 For the above 10 kb DNA, if you use Sau3A to do a complete digestion, you will only get a lot of small fragments ( 200~500 base pairs). What should I do if I want to get larger digested fragments (say 3 to 5 kb) Please answer asap and type your answer and do not copy from anywhere pleasearrow_forward
- The relative proportions of cytosine-guanine and adeninethymine bonds in a DNA sample can be estimated by measuring its “melting temperature,” the temperature at which half of the DNA strands have pulled apart. Samples with a high percentage of cytosine-guanine pairs have a higher melting temperature than samples with a high percentage of adeninethymine pairs. Explain why this is so, considering the nature of the bonds that hold the base pairs together (look back at as shown).arrow_forwardAilee is interested to determine the nucleotide sequence of her bacterial heat shock gene. Hence, DNA sequencing needs to be performed for this analysis. One of the earliest methods invented is known as Sanger sequencing. Explain in detail the mechanism of this sequencing technique with the aid of a simple diagram.arrow_forwardPeople who carry a theoretical genetic disorder (called B-disease) can be identified from a 2kb DNA sequence. People who carry this genetic disorder have a single nucleotide polymorphism that results in a change of GTATCC to GGATCC, a site that only occurs once at nucleotide number 750 in this DNA sequence. Answer the following questions based on the information provided: (a) How can you develop a simple molecular test to identify the genetic disorder (based on the information above) ? (b) If you have carried out the molecular test (based on the information above) on a 100 individual and found that 24 were healthy (BB) and 26 were carriers (bb); 1) What is the ratio of heterozygous? 2) Show how can you identify the three types from the agarose gel ? *note: the carrier means : (bb), I mean the diseased individuals who are carriers of the bb genotype.arrow_forward
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