Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 8, Problem 14CONQ
Summary Introduction
Introduction:
Mutations are any permanent changes or alterations in the genetic material. There are different types of mutations, which may lead to changes in the chromosome such as duplication, deletion, inversion, and translocation. Some of these mutations alter the amount of genetic material and may result in
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Due to crossing over within an inversion loop, a heterozygotewith a pericentric inversion may produce gametes that carrya. a deletion.b. a duplication.c. a translocation.d. both a deletion and a duplication.
Explain why inversions and reciprocal translocations do not usually cause a phenotypic effect. In a few cases, however, they do. Explain how.
Which type(s) of chromosomal aberrations result from chromosomal breaks on different chromosomes? Assume that a heterozygote for the aberration is viable. Select all correct answers.
A.)Robertsonian translocation
B.)reciprocal translocation
C.)tandem duplication
D.)paracentric inversion
E.)pericentric inversion
F.)large deletion
Chapter 8 Solutions
Genetics: Analysis and Principles
Ch. 8.1 - 1. A chromosome that is metacentric has its...Ch. 8.1 - Staining eukaryotic chromosomes is useful because...Ch. 8.2 - Prob. 1COMQCh. 8.3 - Which of the following statements is correct? a....Ch. 8.3 - Prob. 2COMQCh. 8.4 - 1. A paracentric inversion
a. includes the...Ch. 8.4 - Due to crossing over within an inversion loop, a...Ch. 8.4 - 3. A mechanism that may cause a translocation is...Ch. 8.5 - 1. Humans have 23 chromosomes per set. A person...Ch. 8.6 - Prob. 1COMQ
Ch. 8.6 - Prob. 2COMQCh. 8.7 - The term endopolyploidy refers to the phenomenon...Ch. 8.7 - 2. In agriculture, an advantage of triploidy in...Ch. 8.8 - Prob. 1COMQCh. 8.8 - The somatic cells of an allotetraploid contain a....Ch. 8 - 1. Which changes in chromosome structure cause a...Ch. 8 - Prob. 2CONQCh. 8 - 3. How does a chromosomal duplication occur?
Ch. 8 - 4. What is a gene family? How are gene families...Ch. 8 - Prob. 5CONQCh. 8 - Two chromosomes have the following orders for...Ch. 8 - An inversion heterozygote has the following...Ch. 8 - Prob. 8CONQCh. 8 - Explain why inversions and reciprocal...Ch. 8 - 10. An individual has the following reciprocal...Ch. 8 - A phenotypically normal individual has the...Ch. 8 - 12. Two phenotypically normal parents produce a...Ch. 8 - With regard to the segregation of centromeres, why...Ch. 8 - Prob. 14CONQCh. 8 - Prob. 15CONQCh. 8 - 16. A phenotypically abnormal individual has a...Ch. 8 - 17. A diploid fruit fly has eight chromosomes. How...Ch. 8 - Prob. 18CONQCh. 8 - Prob. 19CONQCh. 8 - 20. Aneuploidy is typically detrimental, whereas...Ch. 8 - 21. Explain how aneuploidy, deletions, and...Ch. 8 - Prob. 22CONQCh. 8 - 23. A cytogeneticist has collected tissue samples...Ch. 8 - Prob. 24CONQCh. 8 - A zookeeper has collected a male and a female...Ch. 8 - Prob. 26CONQCh. 8 - 27. What is mosaicism? How is it produced?
Ch. 8 - 28. Explain how polytene chromosomes of Drosophila...Ch. 8 - 29. Describe some of the advantages of polyploid...Ch. 8 - 30. While conducting field studies on a chain of...Ch. 8 - Prob. 31CONQCh. 8 - Which of the following terms should not be used to...Ch. 8 - Prob. 33CONQCh. 8 - Prob. 34CONQCh. 8 - A triploid plant has 18 chromosomes (i.e., 6...Ch. 8 - Prob. 36CONQCh. 8 - Prob. 37CONQCh. 8 - 38. A woman who is heterozygous, Bb, has brown...Ch. 8 - 39. What is an allodiploid? What factor determines...Ch. 8 - Prob. 40CONQCh. 8 - 41. Table 8.1 shows that Turner syndrome occurs...Ch. 8 - 42. Male honeybees, which are haploid, produce...Ch. 8 - Prob. 1EQCh. 8 - Prob. 2EQCh. 8 - With regard to the analysis of chromosome...Ch. 8 - 4. Describe how colchicine can be used to alter...Ch. 8 - 5. Describe the steps you would take to produce a...Ch. 8 - Prob. 6EQCh. 8 - What are G bands? Discuss how G bands are useful...Ch. 8 - A female fruit fly has one normal X chromosome and...Ch. 8 - Prob. 2QSDCCh. 8 - Besides the ones mentioned in this textbook, look...Ch. 8 - Prob. 4QSDCCh. 8 - 5. Discuss the importance of gene families at the...
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- Which type(s) of chromosomal aberrations will suppress recombination in heterozygotes? A.) paracentric inversion B.)pericentric inversion C.)Robertsonian translocation D.)reciprocal translocation E.)tandem duplicationarrow_forwardChange in chromosome numbers will lead to abnormalities. Which of the following is a correct match between the chromosome number and the syndrome? A. Trisomy 18 : Patau syndrome B. Monosomy 18 : Turner syndrome C. XXXY : Klinefelter syndrome D. Trisomy 21 : Edward syndromearrow_forwardIn a sample of 1000 patients with Down syndrome, a geneticist discovers that 95% of them are trisomic, while 5% have diploid number of chromosomes. Explain this discrepancy.arrow_forward
- A boy with Down syndrome (trisomy 21) has 46 chromosomes. One parent and his two older sisters have a normal phenotype, but each have 45 chromosomes. a)Explain how this is possible. b)How many chromosomes do you expect to see in karyotypes of the parents? c)What term best describes this kind of chromosome abnormality? d)What is the probability the next child of this couple will have a normal phenotype and have 46 chromosomes? Explain your answer.arrow_forwardWhich of the following types of chromosomal changes would youexpect to have phenotypic consequences? Explain your choices.A. Pericentric inversionB. Reciprocal translocationC. DeletionD. Unbalanced translocationarrow_forwardMatch the pictures of the small-scale chromosome changes to the terms. A) translocation B) deletion C) inversion D) duplicationarrow_forward
- a. How would you synthesize a pentaploid?b. How would you synthesize a triploid of genotypeA/a/a?c. You have just obtained a rare recessive mutation a*in a diploid plant, which Mendelian analysis tells you isA/a*. From this plant, how would you synthesize atetraploid (4n) of genotype A/A/a*/a*?d. How would you synthesize a tetraploid of genotypeA/a/a/a?arrow_forwardChronic myelogenous leukemia is usually associated with which type of chromosome rearrangement? a. Duplication b. Deletion c. Inversion d. Translocationarrow_forwardYou breed two monster parents (green, hairless) GGhh and ggHH (white, hairy) to produce F1 offspring (green, hairy). Genes G and H are on the same chromosome. a. What are the dominant phenotypes? b. What are ALL of the potential gamete genotypes that could be created by an F1? Clearly indicate the recombinant genotypes. c. Explain how recombinants are created. d. What are the potential offspring genotypes from the cross of a F1 monster with a homozygous recessive monster. e. From this test cross you get 152 green, hairless; 23 green, hairy; 148 white, hairy, and 27 white, hairless. Calculate the chi squared to test the independent assortment hypothesis and determine if these genes assort independently.arrow_forward
- Explain the consequences of a translocation or an inversion.arrow_forwardWith detailed accounts of their various forms, explain any three of the following chromosomal aberrations: a) Deletions b) Duplications c) Translocations d)Inversionarrow_forwardWhat change in chromosome structure causes an extra copy of a chromosomal region to occur? A. Duplication B. Inversion C. Simple translocation D. Deletion E. Reciprocal translocationarrow_forward
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