Concept explainers
A genetic map provides
a. the sequence of the DNA in a genome.
b. the relative position of genes on chromosomes.
c. the location of sites of restriction enzyme cleavage in a known sequence of DNA.
d. the banding pattern of a chromosome.
Introduction:
A map that is produced at the level of DNA sequence requires the entire sequence of genome. This thing was impossible once technologically. But, fundamentally there are only two types of maps, physical maps and genetic maps.
Answer to Problem 1U
Correct answer:
A genetic map provides the relative position of genes on chromosomes. Therefore, option b. is correct.
Explanation of Solution
Reason for the correct statement:
Genetic maps are also known as linkage maps. This method is used to identify the distance between the genes and the locus of a gene. This map is very important, because it helps in locating the traits on a chromosome.
Option b. is given as “the relative position of genes on chromosome”.
As, “genetic map provides the relative position of genes on chromosomes”, it is the right answer.
Hence, option b. is correct.
Reasons for the incorrect statements:
Option a. is given as “the sequence of the DNA in a genome”.
The sequence of the DNA in a genome can be provided by genome sequencing. So, it is a wrong answer.
Option c. is given as “the location of sites of restriction enzyme cleavage in a known sequence of DNA”.
Restriction maps provide the location of site of cleavage by restriction enzyme. So, it is a wrong answer.
Option d. is given as “the banding pattern of a chromosome”.
Chromosome maps are studied by cytologists to provide the banding patterns of chromosome. So, it is a wrong answer.
Hence, options a., c. and d. are incorrect.
Genetic maps also called as “linkage maps” are constructed on the basis of frequency obtained from recombination. It provides relative position of a gene on chromosome.
Want to see more full solutions like this?
Chapter 18 Solutions
BIO 1406/07 W/CONNECT/LM NEW >IC<
- Certain restriction endonucleases produce cohesive (sticky) ends. This means that they: a. stick tightly to the ends of the DNA they have cut. b. cut both DNA strands at the same base pair. c. make a staggered double-strand cut, leaving ends with a few nucleotides of single-stranded DNA protruding. d. cut in regions of high GC content, leaving ends that can form more hydrogen bonds than ends of high AT content. e. cut in regions of high AT content, leaving ends that can form more hydrogen bonds than ends of high GC content.arrow_forwardWhat is the enzymatic function of restriction enzymes? Group of answer choices a. to cut nucleic acids at specific sites b. to join nucleotides during transcription c. to add new nucleotides to the growing strand of DNA d. to repair breaks in sugar - phosphate backbonesarrow_forwardDefine the following terms: a. DNA typing b. short tandem repeats c. DNA profile d. nucleosome e. retrotransposonarrow_forward
- All of the following statements about telomerase are correct except: A. the RNA component acts as a template for the synthesis of a segment of DNA. B. it adds telomeric repeats to the 5'-ends of the DNA strands. C. it provides a mechanism for replicating the ends of linear chromosomes. D. it recognizes a G-rich single strand of DNA E. it is a reverse transcripcase.arrow_forwardPlace the steps of sanger sequencing in order.A. A fluorescent laser excites the fragments and records the wavelength consistent with a single nucleotide. B. ddNTPs bind and stop chain extension.C. DNA fragments are separated by size through a capillary tube. D. DNA polymerase copies the target region of template DNA.E. The final nucleotide of each fragment is labeled with a fluorescent tag.arrow_forwardDescribe how restriction enzymes like EcoR1 are used to create recombinant plasmids and what the process is for using these plasmids to replicate a piece of target DNA. Include information about how to create sticky ends, the makeup of the bacterial plasmid and how to tell if the gene was successfully inserted in the plasmid and if the plasmid has been transformed by the bacteria. You may use a drawing to enhance your description.arrow_forward
- Which of the following molecules helps relieve the tension of unwinding parental DNA strands, by breaking DNA and rejoining it before it is replicated? a. Primase b. Single-stranded binding proteins c. Helicase d. Topoisomerasearrow_forwardMatch the activity below with the correct enzyme. (You won't use all the enzymes listed.) RNA acts as a template for DNA synthesis: RNA directs the cutting of an RNA molecule at a precise location: RNA directs the cutting of an DNA molecule at a precise location: options: a. Small Nuclear Ribonuclear Protein (SNRNP) b. telomerase c. primase d. helicase e. CRISPR/Cas9arrow_forwardDefine the following terms:a. hypochromic effectb. DNA denaturationc. restriction endonucleasesd. DNA hybridizatione. Southern blottingarrow_forward
- Arrange the following steps in the sequence they would happen in a DNA cloning experiment. a. sealing DNA fragments into vectors with DNA ligase; b. utilizing a probe to detect a clone in the library; c. sequencing the clone's DNA; d. creating a DNA library of clones; e. cutting genomic DNA with restriction enzymes. A. e,a,d,b,c B. a,d,b,c,e C. c,b,e,a,d D. e,d,a,c,barrow_forwardWhat is a restriction endonuclease? Select one: a. It is an enzyme that cleaves at a specific nucleotide sequence. b. It restricts the movement of the DNA outside the nucleus. c. It proofreads the DNA for accidental damages and corrects any errors. d. It is an enzyme that separates the DNA double helix.arrow_forwardA linear plasmid contains only two genes, which are transcribed in opposite directions, each one from the end, toward the center of the plasmid. Draw diagrams ofa. the plasmid DNA, showing the 5′ and 3′ ends of the nucleotide strands.b. the template strand for each gene.c. the positions of the transcription-initiation sites.d. the transcripts, showing the 5′ and 3′ ends.arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education