大学MOOC Genetics(Northwest A&F University)1457905184 最新慕课完整章节测试答案

Quiz 1

1、单选题：
‏The first complete DNA sequence of a non-viral, free-living organism was obtained for‌
选项：
A: a bacterium in 1995
B: a bacterium in 1900
C: a bacterium in 1945
D: humans in 1990
E: humans in 2000
答案: 【 a bacterium in 1995】

2、单选题：
‎Genetic information can be carried in which of the following biomolecules?​
选项：
A: Either DNA or RNA
B: Proteins
C: DNA and not RNA
D: RNA and not DNA
答案: 【 Either DNA or RNA】

3、单选题：
‌Which of the following species is considered a genetic model organism?‍
选项：
A: the worm, Caenorhabditis elegans
B: the plant, Linaria vulgaris
C: the deer mouse, Peromyscus maniculatus
D: the frog, Hyla chrysoscelis
E: the chimpanzee, Pan troglodytes
答案: 【 the worm, Caenorhabditis elegans】

4、单选题：
​Which of the following would serve least well as a model for understanding basic mechanisms of inheritance?‎
选项：
A: humans
B: fruit flies
C: yeast
D: mice
E: zebrafish
答案: 【 humans】

5、单选题：
‌Which of the following scientists contributed significantly to the foundations of transmission genetics?​
选项：
A: Thomas Hunt Morgan
B: James Watson
C: John B. S. Haldane
D: Charles Darwin
答案: 【 Thomas Hunt Morgan】

6、单选题：
‍The contribution Charles Darwin made to genetics was to​
选项：
A: propose that evolution occurs by natural selection.
B: demonstrate the connection between Mendel’s principles of inheritance and evolution.
C: develop the theory of evolution, based on earlier theories of population genetics.
D: connect the fields of evolution and molecular genetics.
答案: 【 propose that evolution occurs by natural selection.】

7、单选题：
​The contribution of Gilbert and Sanger to modern genetics was to​
选项：
A: develop a method for sequencing DNA.
B: develop the PCR technique. 
C: discover DNA in the nucleus of cells.
D: describe the structure of DNA.
E: show that genes were made of DNA.
答案: 【 develop a method for sequencing DNA.】

8、判断题：
‌Humans first applied genetics to the domestication of plants and animals between approximately 10,000 and 12,000 years ago. ‏
选项：
A: 正确
B: 错误
答案: 【 正确】

9、判断题：
‍The theory of pangenesis states that all living organisms are composed of cells. ​
选项：
A: 正确
B: 错误
答案: 【 错误】

10、判断题：
‍Many human traits, such as skin and hair color, exhibit blending inheritance, in which genetic information is mixed and is not separated in future generations. ‏
选项：
A: 正确
B: 错误
答案: 【 错误】

11、判断题：
‏Bacteria and viruses can be used to study genes and inheritance, even though they are structurally and metabolically different from animal and plant cells.‌
选项：
A: 正确
B: 错误
答案: 【 正确】

12、判断题：
‍Some viruses have RNA as their genetic information. ‏
选项：
A: 正确
B: 错误
答案: 【 正确】

13、判断题：
‎Charles Darwin accurately described the laws of inheritance in his landmark book, On the Origin of Species.​
选项：
A: 正确
B: 错误
答案: 【 正确】

14、判断题：
‏Some phenotypes or traits, such as hair color, are determined by the information provided by more than a single gene. ​
选项：
A: 正确
B: 错误
答案: 【 正确】

15、判断题：
‏Evolution cannot occur without genetic changes in populations. ‍
选项：
A: 正确
B: 错误
答案: 【 正确】

Quiz 2

1、单选题：
​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?​ ‍​‍‍
选项：
A: M (anaphase)
B: G1
C: S
D: G2
E: M
答案: 【 M (anaphase)】

2、单选题：
‌In eukaryotes, chromosomes do not contain:​
选项：
A: ribosomes
B: chromatin
C: proteins
D: histones
E: DNA
答案: 【 ribosomes】

3、单选题：
​In order to be functional, a eukaryotic chromosome requires all of the following except:‏
选项：
A: a nucleoid.‍
B: a centromere.
C: origins of replication.
D: telomeres.
答案: 【 a nucleoid.‍】

4、单选题：
​What process is unique to plants?​
选项：
A: double fertilization
B: meiosis
C: crossing ove
D: haploid gametes
E: spermatogenesis
答案: 【 double fertilization】

5、单选题：
​Suppose that a diploid cell contains 8 chromosomes (2n = 8).  How many different combinations in the gametes are possible?‏
选项：
A: 16
B: 2
C: 4
D: 8
E: 64
答案: 【 16】

6、单选题：
‌Which of the following statements is FALSE?‍
选项：
A: Errors in chromosome separation are rarely a problem for an organism.
B: Errors in chromosome separation can result in a miscarriage.
C: Errors in chromosome separation can result in cancer.
D: Errors in chromosome separation can result in a child with severe handicaps.
E: Errors in chromosome separation can cause numerous problems for an organism.
答案: 【 Errors in chromosome separation are rarely a problem for an organism.】

7、单选题：
‏Which of the following are NOT prokaryotes?‏
选项：
A: viruses
B: eubacteria
C: archaea
D: ancient bacteria
答案: 【 viruses】

8、单选题：
‏Which of the following statements is FALSE?‌
选项：
A: Generally, chromosomes of eukaryotes are circular.
B: Generally, chromosomes of prokaryotes are circular.
C: Prokaryotes usually have a single molecule of DNA
D: Eukaryotes usually have multiple chromosomes
E: Eukaryote chromosomes are usually linear.
答案: 【 Generally, chromosomes of eukaryotes are circular.】

9、单选题：
‌The attachment point on the chromosome for spindle microtubules is the:​
选项：
A: centromere
B: telomere
C: origin of replication
D: sister chromatid
E: sister chromatid
答案: 【 centromere】

10、单选题：
​The process of spl