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Plants and Society, 3/e
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Genetics
Quiz
1
1. Homologous chromosomes are produced when an offspring receives two identical alleles for a specific character from each of its parents.
A)
True
B)
False
2
2. Mendel chose pea plants for his genetic experiments because they only have heterozygous traits and they never self-pollinate.
A)
True
B)
False
3
3. The reappearance in the F
2
generation of a trait that was previously masked in the F
1
generation is an example of _______.
A)
a. incomplete dominance
B)
b. a testcross
C)
c. the principle of dominance
D)
d. the principle of independent assortment
4
4. Which of the following would a breeder use to determine if a new strain will breed homozygous for a certain trait?
A)
a. testcross
B)
b. recombinant DNA
C)
c. polygenic inheritance
D)
d. all of the above
5
5. In the case of incomplete dominance, the heterozygous phenotype is intermediate between the dominant and the recessive allele.
A)
True
B)
False
6
6. The production of seven different phenotypes from the self-pollination of an F
1
generation that is intermediate in color is an example of _______.
A)
a. frame-shift mutation
B)
b. linkage
C)
c. codominance
D)
d. polygenic inheritance
7
7. In semiconservative replication of DNA, each new molecule of DNA contains only the purine bases, adenine and guanine.
A)
True
B)
False
8
8. Which of the following is the correct RNA sequence for the DNA sequence GCCATAAGT?
A)
a. UGGTATTUA
B)
b. CGGUAUUCA
C)
c. TAAGCGGTG
D)
d. CGGTATTCA
9
9. In transcription, introns are not specifically involved in polypeptide coding, whereas exons are spliced together to form the final mRNA molecule.
A)
True
B)
False
10
10. The deletion of a single base from a DNA sequence
A)
a. may cause inherited diseases.
B)
b. results in a meaningless mRNA message.
C)
c. causes a shift in all of the codons downstream from the deletion.
D)
d. all of the above.
11
11. Somatic mutations occur only in gametes and are passed on to offspring via pollen grains.
A)
True
B)
False
12
12. Which of the following is used to create a recombinant DNA molecule?
A)
a. anticodon
B)
b. allele
C)
c. plasmid
D)
d. all of the above
13
13. Which enzyme is used to splice genes from their normal location when making recombinant DNA?
A)
a. RUBP carboxylase
B)
b. RNA polymerase
C)
c. restriction enzyme
D)
d. amylase
14
14. In the human genome project, researchers have found that only 50% of the nucleotide bases are identical in all people and that most of these bases are adenine and guanine.
A)
True
B)
False
15
15. A BLAST search is used to identify the function of a gene by entering the base sequence into a database and comparing it to known genes.
A)
True
B)
False
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