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Chap 6
Test Description: Second Chapter 6 Review
Instructions: Answer all questions to get your test result.
1) Chargaff's rules state that the amount of ______________ in DNA is always equal to the amount of guanine.
A
Cytosine
B
Thymine
C
Sugar
D
Adenine
2) ________________ allows scientists to transfer genes from one organism to another.
A
Genetic counseling
B
A pedigree
C
Genetic engineering
D
DNA fingerprinting
3) ________________ is a tool for tracing a genetic trait through generations of a family.
A
A pedigree
B
A punnett square
C
A selective breed
D
A DNA fingerprint
4) Examples of chemical ___________ include asbestos and chemicals found in cigarette smoke; these substances often lead to mutations in the DNA sequence of an individual's cells.
A
mutations
B
substitutions
C
mutagens
D
insertions
5) The code for a given amino acid consists of ____________ base(s).
A
three
B
four
C
one
D
two
6) What materials make up each nucleotide in a DNA molecule?
A
chromosomes and genes
B
a gene, an allele, and a trait
C
a sugar, a phosphate, and a base
D
an amino acid, a base, and a protein
7) Most genetic disorders, such as sickle cell anemia, are due to a
A
pedigree
B
dominant gene
C
recessive gene
D
ribosome
8) A complementary strand to the DNA sequence TAGTCA would be
A
GACAGT
B
GTAGAT
C
ATGAGT
D
ATCAGT
9) Which of the following statements is FALSE?
A
A mutation can affect the traint of an organism
B
The environment has no influence on a person's trait
C
Several genes may affect a single trait
D
A single gene can affect more than one trait
10) Genetic engineering is currently used to
A
repair damaged genes
B
All of the above
C
manufacture proteins
D
genetically alter plants
11) What are the three types of mutations?
A
substitution, insertion, division
B
deletion, substitution, insertion
C
insertion, division, addition
D
deletions, insertions, division
12) All mutations are harmful.
A
True
B
False
13) When DNA replicates itself, the DNA molecule first splits down the middle, then the bases on each strand pair up with other nucleotides, creating two identical DNA molecules.
A
False
B
True
14) Rosalind Franklin's X-ray images showed DNA to have a linear shape.
A
True
B
False
15) In incomplete dominance, each of the two alleles that determine a trait has its own degree of influence.
A
False
B
True
*select an answer for all questions
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