Which of these changes in chromosome structure alter the total amount of genetic material? 21 1 1 24 3 1 1 2 3Deletion(a)11 234 3 2 3 2Duplication(b)4 32 1 12 34 2 3 1 12 3Inverslon(c)14 32 1 1 21 2Simple211translocation(d)4 32 1 1 2211 2Reciprocaltranslocation43 2 1(e)Types of changes in chromosome structure. The large chromosome shown throughout is human chromosome 1.The smaller chromosome seen in (d) and (e) is human chromosome 21. The red arrows indicatethe ends of the affected portion. (a) A deletion removes a large portion of the q2 region, indicated by the red arrows. (b) Aduplication doubles the q2-q3 region. (c) An inversion inverts the q2-q3 region. (d) The q2-q4 region of chromosome 1 istranslocated to chromosome 21. A region of a chromosome cannot be attached directly to the tip of another chromosomebecause telomeres at the tips of chromosomes preventsuch an event. In this example, a small piece at the end of chromosome21 must be removed for the q2-q4 region of chromosome 1 to be attached to chromosome 21. (e) The q2-q4 regionof chromosome 1 is exchanged with the q1-q2 region of chromosome 21.

Answered: 21 1 1 2 4 3 1 1 2 3 Deletion (a) 11 2…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which of these changes in chromosome structure alter the total amount of genetic material?

21 1 1 2
4 3 1 1 2 3
Deletion
(a)
11 2
3
4 3 2 3 2
Duplication
(b)
4 3
2 1 12 3
4 2 3 1 12 3
Inverslon
(c)
14 3
2 1 1 2
1 2
Simple
211
translocation
(d)
4 3
2 1 1 2
211 2
Reciprocal
translocation
43 2 1
(e)
Types of changes in chromosome structure. The large chromosome shown throughout is human chromosome 1.
The smaller chromosome seen in (d) and (e) is human chromosome 21. The red arrows indicate
the ends of the affected portion. (a) A deletion removes a large portion of the q2 region, indicated by the red arrows. (b) A
duplication doubles the q2-q3 region. (c) An inversion inverts the q2-q3 region. (d) The q2-q4 region of chromosome 1 is
translocated to chromosome 21. A region of a chromosome cannot be attached directly to the tip of another chromosome
because telomeres at the tips of chromosomes preventsuch an event. In this example, a small piece at the end of chromosome
21 must be removed for the q2-q4 region of chromosome 1 to be attached to chromosome 21. (e) The q2-q4 region
of chromosome 1 is exchanged with the q1-q2 region of chromosome 21.

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Chromosomes may undergo rearrangements that are the mutations in the chromosomes that can alter the structures or order of genes present on individual chromosomes. Mutation causes chromosomal rearrangement which induces change in structure of native chromosomes. The chromosomal rearrangements are of four types, namely deletions, duplications, inversions, and translocations.

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