Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 8QP
Tetraploidy may result from:
- a. lack of cytokinesis in meiosis II
- b. nondisjunction in meiosis I
- c. lack of cytokinesis in mitosis
- d. nondisjunction in mitosis in the early embryo
- e. none of these
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which of these could lead to the mistake evident in the karyotype?
A) a failure of cytokinesis after meiosis I in gamete formation
B) a nondisjunction in meiosis II in gamete formation
C) crossing over in meiosis ! in gamete formation
D) fertilizaton by two sperm in zygote formation
At the end of meiosis in humans, four gametes are produced that are:
A.
Genetically identical to each other and to the parent cell
B.
Genetically identical to each other but genetically different from the parent cell
C.
Genetically different from each other and the parent cell
D.
Genetically identical to the parent cell from different from each other
Consider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur?
a.Meiosis I and II
b.Only meiosis I
c.Mitosis
d.Only meiosis II
e.Nondisjunction did not occur
Chapter 6 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 6 - Genetics in Practice case studies are...Ch. 6 - Genetics in Practice case studies are...Ch. 6 - Analyzing Karyotypes 1. Originally, karyotypic...Ch. 6 - Given the karyotype shown at right, is this a male...Ch. 6 - A colleague e-mails you saying that she has...Ch. 6 - What are the two most commonly used methods of...Ch. 6 - Prob. 5QPCh. 6 - Discuss the following sets of terms: a. trisomy...Ch. 6 - What chromosomal abnormality can result from...Ch. 6 - Tetraploidy may result from: a. lack of...
Ch. 6 - A cytology student believes he has identified an...Ch. 6 - An individual is found to have some tetraploid...Ch. 6 - A spermatogonial cell undergoes mitosis before...Ch. 6 - A teratogen is an agent that produces nongenetic...Ch. 6 - As a physician, you deliver a baby with protruding...Ch. 6 - Variations in Chromosome NumberAneuploidy Describe...Ch. 6 - A woman gives birth to monozygotic twins. One boy...Ch. 6 - Assume that a meiotic-nondisjunction event causes...Ch. 6 - Prob. 17QPCh. 6 - What is the genetic basis and phenotype for each...Ch. 6 - The majority of nondisjunction events leading to...Ch. 6 - Prob. 20QPCh. 6 - If all the nondisjunction events leading to Turner...Ch. 6 - Identify the type of chromosomal aberration...Ch. 6 - Describe the chromosomal alterations and phenotype...Ch. 6 - A geneticist discovers that a girl with Down...Ch. 6 - Albinism is caused by an autosomal recessive...Ch. 6 - Fragile-X syndrome causes the most common form of...
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Separation of homologous chromosomes during Meiosis I requires:
Select one:
a.
Removing centromere cohesion
b.
Nondisjunction
c.
Separase
If nondisjunction occurred during Meiosis II:
Select one:
a.
We assume all other meiotic events occurred normally
b.
All four gametes will be abnormal
c.
There is a higher risk that a second nondisjunction event occurred
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What is it called when chromosomes fail to separate properly during meiosis?
A. Nondisjunction
B. Karyotype
C. Chromosomal separation failure
D. Inappropriate separation
E. Karyokinesis
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The four daughter cells pictured below resulted from:
A) normal mitosis
B) fertilization with a normal sperm
C) normal meiosis
D) meiosis with nondisjunction during meiosis I
E) meiosis with nondisjunction during meiosis II
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During meiosis...
A.
Only sister chromatids come together before segregating to different daughter cells
B.
Only homologous chromosomes come together before segregating to different daughter cells
C.
Both sister chromatids and homologous chromosomes come together before segregating to different daughter cells
D.
none of the above
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Which of the following is the primary difference between mitosis and meiosis?
A.
Meiosis occurs in somatic cells, whereas mitosis is only used to produce germ cells.
B.
Mitosis occurs in somatic cells, whereas meiosis is only used to produce germ cells.
C.
Meiosis always occurs much more quickly than mitosis.
D.
Only meiosis includes a separation division step, which occurs during Meiosis I.
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What went wrong during meiosis of the parent cell on the left?
a) nondisjunction during meiosis I
b) nothing went wrong
c) nondisjunction during meiosis II
d) monosomy during meiosis II
e) trisomy during meiosis I
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What cellular process is responsible for genetic recombination?
a. The independent alignment of homologous pairs during meiosis I
b. Separation of the homologues in meiosis I
c. Separation of the chromatids during meiosis II
d. Crossing over between homologues
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Which of the following best describes Klinefelter syndrome?
A.
It is an example of aneuploidy.
B.
Affected individuals are males with low fertility.
C.
Only one X chromosome is active in these individuals.
D.
All of the above.
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A) At the end of meiosis I, how many chromosomes are in each cell?
B) Are the cells haploid or diploid?
C) Are the chromosomes of the meiosis I products replicated or nonreplicated?
D) During which phase in meiosis I would crossing over have occurred?
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Crossing over....
a. leads to the exchange of material between homologous chromosomes in meiosis.
b. requires the pairing of homologous chromosomes in prophase of meiosis I.
c. happens less frequently between genes that are far apart on a chromosome than between genes that are close together.
d. a and b, but not c
e. a, b, and c
arrow_forward
Consider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur?
a.
Only meiosis I
b.
Mitosis
c.
Meiosis I and II
d.
Nondisjunction did not occur
e.
Only meiosis II
Clear my choice
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Nondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropy
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