Human Biology Custom Edition
11th Edition
ISBN: 9781337631532
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 20, Problem 5SQ
A chromosome’s structure can be altered by _______.
- a. deletions
- b. duplications
- c. translocations
- d. all of the above
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if two genes are linked ____
A. they are on different chromosomes
B. they assort independently
C. they code for the same protein
D. they are on the same chromosome
The following characteristics are associated with all variations in
chromosomal structure EXCEPT ____.
A. Breakages result in the production of sticky ends
B. They begin with a chromosomal break
C. They can result in genomic instability
D. Broken ends are prone to degradation
E. They cause heritable defects when induced during mitosis in somatic cells
A chromosome initially has the following segments: A B • C D E F G Draw the chromosome, identifying its segments, that would result from each of the following mutations. a. Tandem duplication of DEF b. Displaced duplication of DEF c. Deletion of FG d. Paracentric inversion that includes DEFG e. Pericentric inversion of BCDE
Chapter 20 Solutions
Human Biology Custom Edition
Ch. 20 - Prob. 1RQCh. 20 - What is a carrier of a genetic trait?Ch. 20 - What evidence indicates that a trait is coded by a...Ch. 20 - Prob. 4RQCh. 20 - Explain what nondisjunction is, and give two...Ch. 20 - _______ segregate during ______. a. Homologues;...Ch. 20 - Prob. 2SQCh. 20 - Genes on the same chromosome tend to stay together...Ch. 20 - Prob. 4SQCh. 20 - A chromosomes structure can be altered by _______....
Ch. 20 - Nondisjunction can be caused by ________. a....Ch. 20 - A gamete affected by nondisjunction could have...Ch. 20 - Genetic disorders can be caused by __________. a....Ch. 20 - A person who is a carrier for a genetic trait...Ch. 20 - Prob. 10SQCh. 20 - If a couple has six boys, what is the probability...Ch. 20 - Human sex chromosomes are XX for females and XY...Ch. 20 - People with Down syndrome have an extra copy of...Ch. 20 - Prob. 4CTCh. 20 - Prob. 5CTCh. 20 - About 4 percent of people of Northern European...Ch. 20 - The following pedigree shows the pattern of...
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- In which of the following is genetic material moved betweennonhomologous chromosomes?a. insertion d. translocationb. nondisjunction e. inversionc. deletionarrow_forwardUnder 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_forwardWhen recombination (“crossing over”) doesn’t happen correctly, what type(s) of mutations that can occur? circle all that apply Select one or more: a. Inversion (reversal or “flipping” of part of a chromosome) b. Duplication of part of a chromosome c. Translocation (transfer of part of a chromosome to a non-homologous chromosome) d. Deletion of part of a chromosomearrow_forward
- Which types of mutations cause (1 word) a. Increase amount of genetic material in particular chromosome b increase amount of genetic material in all chromosomes c decreased amount of generic material in particular chromsomes d change to position of dna sequence in singular chromosome without changing the amount of genetic material e move dna from one chromosome to non homologous chromosomearrow_forwardChromosome translocations include: A. Alterations in which the genetic material remains the same but rearranged B. Alterations in which the total amount of genetics information increases C. Alterations in which the total amount of genetics information decreases D. Variations in the chromosome numberarrow_forward46. Ioko dedod Uesty A. Cri du chat syndrome B. chromosome 5p deletion syndrome C.5p minus syndrome or Lejeune's syndrome D. All 53. Identify the condition base on the picture A. Down syndrome B. patau syndrome C. Klinefelter syndrome D. Edward syndromearrow_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_forwardA chromosome initially has the following segments:A B • C D E F G Draw the chromosome, identifying its segments, that would result from the following mutations. Q.Deletion of FGarrow_forwardDuring ________, maternal and paternal chromosomes that occur in a gamete are shuffled. Group of answer choices A. recombination B. replication C. permutation D. regulationarrow_forward
- and down syndrome the victim has an extra chromosome 21. Therefore, down syndrome is a kind of ___ and results from ___. A. aneuploidy... nondisjunction of chromosome 21 during meiosis B. polyploidy... occurrence of meiosis without cytokinesis C. translocation… insertion of a transposon into chromosome 21 D. replication air… An extra cycle of DNA synthesis during the five phasearrow_forwardWhy are individuals with an extra chromosome 21, that causes Down syndrome, more numerous than individuals with an extrachromosome 3 or chromosome 16? A.] There are probably more genes on chromosome 21 than on the others B.] Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not C.] Down syndrome is not more common, just more serious D.] Extra copies of the other chromosomes are probably fatalarrow_forwardMatch the chromosomal rearragement shown below (a-d) with the term for that particular chromosomal rearrangement. a. A B C D E Original chromosome A B C D E F Rearranged chromosome b. A B C. d. A B C DE F G A M N C D 3 E S A B C D G A B C D Q R G M N P EF S 1. Duplication 2. Deletion 3. Translocation 4. Inversionarrow_forward
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