Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20.1, Problem 1COMQ
Homologous recombination refers to the exchange of DNA segments that are
a. similar or identical in their DNA sequences.
b. in close proximity to one another.
c. broken due to ionizing radiation.
d. misaligned along a chromosome.
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Students have asked these similar questions
How is homologous recombination for DNA repair different from recombination in meiosis? Choose all correct answers.
a. HR in DNA repair requires a double-strand break, but meiotic recombination does not.
b. HR in DNA repair requires strand invasion, but meiotic recombination does not.
c. HR in DNA repair results in identical chromosomes. Meiotic recombination results in changes to the DNA sequence of the "repaired" chromosomes.
d. HR in DNA repair uses a newly synthesized identical chromosome as a template. Meiotic recombination uses a homologous chromosome as a template.
During the molecular process of homologous recombinationbetween homologous chromosomes,a. a Holliday junction forms.b. branch migration occurs.c. a heteroduplex region forms.d. all of the above occur.
Define the following terms: a. A-DNA b. B-DNA c. pseudogene d. cruciform e. intron
Chapter 20 Solutions
Genetics: Analysis and Principles
Ch. 20.1 - 1. Homologous recombination refers to the exchange...Ch. 20.1 - During the molecular process of homologous...Ch. 20.1 - 3. A key difference between the original Holliday...Ch. 20.1 - Which of the following mechanisms can cause gene...Ch. 20.2 - 1. During site-specific recombination that occurs...Ch. 20.2 - Prob. 2COMQCh. 20.3 - Which of the following types of transposable...Ch. 20.3 - Prob. 2COMQCh. 20.3 - Prob. 3COMQCh. 20 - 1. Describe the similarities and differences...
Ch. 20 - Prob. 2CONQCh. 20 - 3. Which steps in the double-strand break model...Ch. 20 - Prob. 4CONQCh. 20 - Prob. 5CONQCh. 20 - Prob. 6CONQCh. 20 - Prob. 7CONQCh. 20 - 8. What is gene conversion?
Ch. 20 - Make a list of the differences between the...Ch. 20 - Prob. 10CONQCh. 20 - Prob. 11CONQCh. 20 - 12. According to the double-strand break model,...Ch. 20 - What type of DNA structure is recognized by RecG...Ch. 20 - Briefly describe three ways that antibody...Ch. 20 - 15. Describe the functions of the RAG1 and RAG2...Ch. 20 - According to the scenario shown in Figure 20.7,...Ch. 20 - Prob. 17CONQCh. 20 - Prob. 18CONQCh. 20 - 19. Why does transposition always produce direct...Ch. 20 - 20. Which types of TEs have the greatest potential...Ch. 20 - Prob. 21CONQCh. 20 - 22. Let’s suppose that a species of mosquito has...Ch. 20 - This chapter describes different types of TEs,...Ch. 20 - Prob. 24CONQCh. 20 - Prob. 25CONQCh. 20 - 26. What is the difference between an autonomous...Ch. 20 - 1. Briefly explain how McClintock determined that...Ch. 20 - The work of McClintock showed that the presence of...Ch. 20 - 3. In your own words, explain the term transposon...Ch. 20 - Prob. 4EQCh. 20 - 5. Gerald Rubin and Allan Spradling devised a...Ch. 20 - Make a list of the similarities and differences...Ch. 20 - Prob. 2QSDCCh. 20 - Prob. 3QSDC
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- Under the influence of gamma-radiation a fragment of the chromosome was lost. What chromosomal mutation is it? Select one: a. Deletion. b. Duplication. c. Inversion. d. Intrachromosomal translocation. O e. Interchromosomal translocation.arrow_forwardGriffith's experiment demonstrated a "bacterial transformation" that A. brought heat-killed bacteria back to life. B. caused two non-virulent bacterial strains to become virulent. C. allowed a bacteriophage to inject proteins into mice. D. caused two virulent bacterial strains to become non-virulent.2. An organism that has more chromosomes than is appropriate for its species is said to be A. diploid.. triploid. C. aneuploid. D. euploid. 3. During which cellular process does the enzyme helicase play an essential role? A. DNA replication B. Amino acid synthesis C. RNA transference D. Protein synthesisarrow_forwardA.) Homologous recombination repair are prone to error and can cause loss of genome integrity. B.) Reversal and repairing of DNA strands damage is important in maintaining genome integrity. a. Statement A is correct b. Statement B is correct c. Both A and B are correct d. Both A and B are incorrectarrow_forward
- Eukaryotic chromosomes a. have only histones b. have DNA and RNA c. have DNA, RNA, and protein d. have DNA, histones, and scaffold protein e. are made of RNA and proteinarrow_forwardHow would the process of the double holiday junction model differ if identical DNA molecules were used in place of homologous ones? A.) Crossing over would NEVER be observed B.) No change the entire process would be the same C.) Gene conversion would never occur D.) Crossing over would ALWAYS be observed do not copy from othersarrow_forwardWhat observations are consistent with the conclusion that DNA serves as the genetic material in eukaryotes? Select the four correct statements. a. DNA content and ploidy in various cell types( sperm and somatic cells) are related b. DNA is found to be the only macromolecule in eukaryotes that has different subunits. c. Gene transfer is a direct evidence as it has been facilitated by recombinant DNA techniques. d. The correlation of the action and absorption spectra of ultraviolet light support the interpretation that DNA is a genetic material. e. DNA is shown to be present in ribosomes, matrix, and nucleus, where genetic function is performed. f. DNA is shown to be present in mitochondria, chloroplasts, and nucleus, where genetic function is performed.arrow_forward
- Many chromosomes have structures called telomeres at each end. Mark all the TRUE statements about telomeres below. Mark all that apply. Select one or more: a. Telomeres protect the ends of the chromosomes b. Telomeres hold sister chromatids together after replication c. Human telomeres consist of a specific base sequence (TTAGGG) repeated about 2500 times d. Telomeres are present in all prokaryotes and eukaryotesarrow_forwardWhich of the following is a FALSE statement regarding human chromosomes? A. The chromosome number in humans is 2n=46. B. Gametes have half number of the chromosomes as in somatic cells. C. There are 22 pairs of autosomes and 2 sex chromosomes. D. Liver cells can be polyploids. They can have 23, 46, 69 or 92 chromosomes.arrow_forwardIn this image of the human karyotype: A. The sister chromatids have separated B. There are 46 pairs of chromosomes C. The DNA has already been replicated D. There are 23 pairs of autosomes E. None are true.arrow_forward
- Which types of chromosome mutations a. increase the amount of genetic material in a particular chromosome? b. increase the amount of genetic material in all chromosomes? c. decrease the amount of genetic material in a particular chromosome? d. change the position of DNA sequences in a single chromosome without changing the amount of genetic material? e. move DNA from one chromosome to a nonhomologous chromosome?arrow_forwardIn which of the following is genetic material moved betweennonhomologous chromosomes?a. insertion d. translocationb. nondisjunction e. inversionc. deletionarrow_forwardWhich of the following statements is true? a. Linear chromosome structures observed in a karyotype are actually pairs of sister chromatids. b. Prokaryotic and eukaryotic cells divide through binary fission. c. Because chromosomes of prokaryotes are smaller than eukaryotic chromosomes, prokaryotic nuclei are also smaller. d. The genetic information found in a eukaryotic chromosome makes up the cell's entire genome.arrow_forward
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