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Chapter 2 Chromosomes and Cellular Reproduction Chapter 2 测验
1、 A dividing eukaryotic cell is treated with a drug that inhibits the molecular motors associated with kinetochores. At which cell cycle stage would it stop?
A:G1
B:S
C:G2
D:M (anaphase)
E:M (telophase)
答案: M (anaphase)
2、 In eukaryotes, chromosomes do not contain:
A:ribosomes.
B:chromatin
C:proteins
D:histones
E:DNA
答案: ribosomes.
3、 In order to be functional, a eukaryotic chromosome requires all of the following except:
A:a centromere.
B:origins of replication.
C:a nucleoid.
D:telomeres.
答案: a nucleoid.
4、 What process is unique to plants?
A:meiosis
B:double fertilization
C:crossing over
D:haploid gametes
E:spermatogenesis
答案: double fertilization
5、 Suppose that a diploid cell contains 8 chromosomes (2n = 8). How many different combinations in the gametes are possible?
A:2
B:4
C:8
D:16
E:64
答案: 16
6、 Which of the following statements is FALSE?
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation are rarely a problem for an organism.
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation can result in a miscarriage.
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation can result in cancer.
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation can result in a child with severe handicaps.
E:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation can cause numerous problems for an organism.
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Errors in chromosome separation are rarely a problem for an organism.
7、 Which of the following are NOT prokaryotes?
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}eubacteria
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}archaea
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}viruses
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}ancient bacteria
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}viruses
8、 Which of the following statements is FALSE?
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Generally, chromosomes of prokaryotes are circular.
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Prokaryotes usually have a single molecule of DNA.
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Generally, chromosomes of eukaryotes are circular.
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Eukaryotes usually have multiple chromosomes.
E:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Eukaryote chromosomes are usually linear.
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}Generally, chromosomes of eukaryotes are circular.
9、 The attachment point on the chromosome for spindle microtubules is the:
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}telomere
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}centromere
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}origin of replication
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}sister chromatid
E:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}sister chromatid
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}centromere
10、 The process of splitting the cytoplasm, which separates one cell into two, is termed:
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}cytokinesis
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}mitosis
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}anaphase
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}diakinesis
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}cytokinesis
11、 Diploid cells are cells with ______ chromosomes.
A:a single set of
B:circular
C:two sets of
D:many sets of
E:three sets of
答案: two sets of
12、 If a healthy cell passes the G1/S checkpoint:
A:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}it will enter the G0 stage of the cell cycle.
B:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}DNA will be replicated.
C:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}it will not divide.
D:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}it will proceed immediately to cytokinesis.
E:p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}it will die.
答案: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px ‘Times New Roman’}DNA will be replicated.
13、 Errors in chromosome separation are rarely a problem for an organism.
A:正确
B:错误
答案: 错误
14、 The prokaryotes include both the eubacteria and the archaea.
A:正确
B:错误
答案: 正确
15、 Archaea are more closely related to eukaryotes than they are to eubacteria.
A:正确
B:错误
答案: 正确
16、 Generally, chromosomes of eukaryotes are circular.
A:正确
B:错误
答案: 错误
17、 Cells with a single set of chromosomes are called diploid.
A:正确
B:错误
答案: 错误
Chapter 3 Basic Principles of Heredity Chapter 3 测验
1、 Genes come in different versions called:
A:alleles
B:loci
C:genotypes
D:chromosomes
E:genomes
答案: alleles
2、 In Mendel’s peas, purple flower color is dominant to white. From which of the following descriptions can you not infer the genotype for the locus completely?
A:purple
B:white
C:pure-breeding purple
D:heterozygous
答案: purple
3、 Which of the following was not one of Mendel’s conclusions based on his monohybrid crosses?
A:Genes are carried on chromosomes.
B:Genes exist in pairs.
C:Members of a gene pair segregate equally into gametes.
D:Genes behave as particles during inheritance.
E:One member of a gene pair can mask the expression of the other member.
答案: Genes are carried on chromosomes.
4、 In Mendel’s peas, yellow seeds are dominant to green. A pure-breeding yellow plant is crossed with a pure-breeding green plant. All of the offspring are yellow. If one of these yellow offspring is crossed with a green plant, what will be the expected proportion of plants with green seeds in the next generation?
A:0%
B:25%
C:50%
D:75%
E:100%
答案: 50%
5、 In a cross between pure-breeding tall plants with pure-breeding short plants, all of the F1 are tall. When these plants are allowed to fertilize themselves, the F2 plants occur in a ratio of 3 tall:1 short. Which of the following is not a valid conclusion from these results?
A:The allele that produces the tall condition is dominant to the allele that produces the short condition.
B:The difference between tall and short stature in these lines is controlled by a single gene pair.
C:During production of gametes in F1 plants, the tall and short alleles segregate from each other equally into the gametes.
D:The tall and short traits assort independently of each other in this cross.
E:Fertilization occurs randomly between gametes carrying the tall and short alleles.
答案: The tall and short traits assort independently of each other in this cross.
6、 In poodles, black is dominant to white. A black poodle is crossed with a white poodle. In a litter of four, all of the puppies are black. What is the best conclusion?
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