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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
Thymine
B
Sugar
C
Cytosine
D
Adenine
2) ________________ allows scientists to transfer genes from one organism to another.
A
Genetic counseling
B
Genetic engineering
C
DNA fingerprinting
D
A pedigree
3) ________________ is a tool for tracing a genetic trait through generations of a family.
A
A selective breed
B
A punnett square
C
A pedigree
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
mutagens
B
insertions
C
substitutions
D
mutations
5) The code for a given amino acid consists of ____________ base(s).
A
four
B
two
C
three
D
one
6) What materials make up each nucleotide in a DNA molecule?
A
a sugar, a phosphate, and a base
B
an amino acid, a base, and a protein
C
a gene, an allele, and a trait
D
chromosomes and genes
7) Most genetic disorders, such as sickle cell anemia, are due to a
A
ribosome
B
dominant gene
C
recessive gene
D
pedigree
8) A complementary strand to the DNA sequence TAGTCA would be
A
ATCAGT
B
GTAGAT
C
ATGAGT
D
GACAGT
9) Which of the following statements is FALSE?
A
Several genes may affect a single trait
B
A mutation can affect the traint of an organism
C
The environment has no influence on a person's trait
D
A single gene can affect more than one trait
10) Genetic engineering is currently used to
A
manufacture proteins
B
All of the above
C
genetically alter plants
D
repair damaged genes
11) What are the three types of mutations?
A
insertion, division, addition
B
deletion, substitution, insertion
C
substitution, insertion, division
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
True
B
False
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
True
B
False
*select an answer for all questions
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