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 26CONQ
Summary Introduction
To review:
Endopolyploidy and its biological significance.
Introduction:
Polyploidy is a condition in which an organism acquires multiple copies of two paired set of chromosomes. Polyploidy can occur due to abnormal cell division during mitosis or metaphase 1 of meiosis. Chemicals like Oryzalin and Colchicine can induce polyploidy in plants.
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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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- A researcher is studying the cytology of an organism with endopolyploidy. What will she expect to see? A) Most cell types will be diploid, but one cell type will contain extra copies of all the chromosomes. O B) Aneuploid cells will occasionally arise, but will be quickly eradicated. C) Most cell types will be euploid, but some will be aneuploid. D) All cell types will be polyploid, but the number of copies will vary.arrow_forwardWhat causes Tetraploidy?arrow_forwardWhat creates polyploid plants in the wild? A) Complete meiotic nondisjunction B) Complete mitotic nondisjunction in a stem of the plant C) Crossovers involving a chromosome with a large inversion D) colchicinearrow_forward
- What is meant by incomplete linkage? What does this have to do with pairing of chromosomes during meiosis?arrow_forwardWhat is an allodiploid? What factor determines the fertility of anallodiploid? Why are allotetraploids more likely than allodiploidsto be fertile?arrow_forwardHow is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and polyploidy are caused, and what are the consequences of these chromosomal alterations in terms of survival and fertility of the offspring?arrow_forward
- How is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and polyploidy are caused, and what are the consequences of these chromosomal alterations in terms of survival and fertility of the offspring? Edit View Insert Format Tools Tablearrow_forwardA) Give the diploid number of this organism. B) Is it mitosis or meiosis? Give two (2) elements on which you base your reasoning. C) Identify this mystery phase of the cell cycle. D) How many daughter cells will be produced at the end of the process and how many chromosomes (in numbers) will they contain? E) How does this process ensure the genetic variability of individuals of the species? Your answer must be based on two (2) different elements.arrow_forwardwhat are autopolyploids?arrow_forward
- What is the mechanism of generating aneuploiding A) Mitotic unequal segregation of chromatidsB)Meiotic nondisjunction of chromosomesC) Mitotic nondisjunction of chromosomal pairsarrow_forwardWhy must the life cycle of sexually reproducing species alternate between haploid and diploid stages? A) Mitosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. B) Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. C) Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. D) Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation.arrow_forwardAre human gametes haploid or diploid? Are human somatic cells haploid or diploid? Are fertilized eggs haploid or diploid?arrow_forward
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