Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 20, Problem 8SQ
Genetic disorders can be caused by __________.
- a. gene mutations
- b. changes in chromosome structure
- c. changes in chromosome number
- d. all of the above
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Chapter 20 Solutions
Human Biology (MindTap Course List)
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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- Human body cells are diploid, which mean they______ . a. divide to form two cells b. have two full sets of chromosomes c. contain two chromosomesarrow_forwardif 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 chromosomearrow_forwardA female born with Angelman syndrome carries a deletion in theAS gene (i.e., the UBE3A gene). Which parent transmitted thedeletion to her?a. Her father c. Either her mother or fatherb. Her motherarrow_forward
- DNA doubles ___. A. before mitosis B. during metaphase of mitosis C. at any time during cell division D. during prophase of mitosis E. immediately before prophase of mitosisarrow_forwardinterphase chromosomes are __________ while mitotic chromosomes are a. composed of 4 DNA strands; composed of 2 DNA strand b. composed of 1 DNA Strand; composed of 2 DNA strands c.composed of 2 DNA strands; composed of 1 DNA strand d. composed of 2 DNA strands; composed of 4 DNA strandsarrow_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_forward
- The characteristic “X” shape of chromosomes is _____. a. a result of maximum compaction of the chromosome b. due to the wrapping of DNA around histones c. only evident during cell division d. indicative of a cell that is no longer dividing e. only found in the female sex chromosomearrow_forwardWhich of the following traits are common to many cancer cells (more than one answer may be correct)A. Uncontrolled growth and divisionB. Chromosomes abnormalitiesC. Absence of a cytoskeletonD. Decreased adhesion to other cellsarrow_forwardThis is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it.arrow_forward
- What is Patient C's karyotype? A. Last song syndrome B. Trisomy 21 C. Marfan syndrome D. Patau syndromearrow_forwardexplain this cactus mutationarrow_forward___i___ sex chromosome is present in male Drosophila and ___ii___ sex chromosome is found in female Drosophila. This statement is completed by the information in row ______. Row i ii A. XY XX B. XX XO C. XO XX D. XX XYarrow_forward
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