A) 0
B) 35
C) 70
D) 140
E) 280
G) A) and E)
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Correct Answer
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A) cytokinesis
B) spindle formation
C) pairing of homologous chromosomes
D) separation of genetic material
E) alignment of chromosomes at the spindle equator
G) None of the above
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Correct Answer
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A) organismal growth
B) creating genetic variability
C) reducing the chromosome number in gametes
D) keeping the chromosome number constant from one generation to the next
E) producing gametes
G) A) and B)
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Correct Answer
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A) genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.
B) genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles.
C) sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles.
D) nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles.
E) one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles.
G) C) and D)
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Correct Answer
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A) Chromosomes are classified into two categories:the sex chromosomes that determine gender and autosomes that determine non-gender related traits.
B) Homologous chromosomes differ in banding patterns, the traits they code for, and size.
C) While sex chromosomes determine different genders, they look the same until they are stained.
D) In humans all 46 chromosomes have an identical match called the homologue.
E) Chromosomes are classified into two categories:autosomes that determine gender and the sex chromosomes that determine non-gender related traits.
G) C) and D)
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A) an individual with Swyer syndrome has a Barr body, while an individual with Klinefelter syndrome does not.
B) an individual with Klinefelter syndrome has a functional SRY gene on his Y chromosome, whereas an individual with Swyer syndrome does not.
C) both individuals have a functional SRY gene, but the extra X chromosome makes the individual with Klinefelter syndrome appear female.
D) neither individual has a functional SRY gene, but the X chromosome of the individual with Swyer syndrome has a functional SRY and appears male.
E) an individual with Swyer syndrome lacks a functional SRY gene, but appears male because it has moved to the X chromosome as in an individual with Klinefelter syndrome.
G) B) and C)
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Correct Answer
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A) sister chromatids are separated during meiosis I, while homologous chromosomes are separated during meiosis II.
B) crossing-over occurs in prophase of meiosis I but not in prophase of meiosis II.
C) the resulting cells at the end of meiosis I are diploid, while the cells at the end of meiosis II are haploid.
D) in telophase of meiosis I, four gametes form from the parent cell, and in telophase of meiosis II, each parent cell gives rise to two identical daughter cells.
E) in meiosis I there is no pairing of chromosomes while homologues pair in meiosis II.
G) A) and D)
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A) two chromosomes with two sister chromatids each.
B) two sister chromatids with separate centromeres.
C) four chromosomes with two sister chromatids each.
D) four sister chromatids, each with its owncentromere.
E) four sister chromatids attached at a common centromere.
G) B) and D)
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Correct Answer
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A) facing the same spindle pole.
B) facing both spindle poles.
C) facing opposite spindle poles.
D) not facing either spindle pole.
E) being separated into two sister chromatids.
G) B) and D)
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A) 1
B) 2
C) 4
D) 8
E) 16
G) C) and E)
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Correct Answer
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