Chap 6 Question Preview (ID: 23078)
Second Chapter 6 Review.
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Chargaff's rules state that the amount of ______________ in DNA is always equal to the amount of guanine.
a) Thymine
b) Adenine
c) Cytosine
d) Sugar
________________ allows scientists to transfer genes from one organism to another.
a) Genetic counseling
b) DNA fingerprinting
c) A pedigree
d) Genetic engineering
________________ is a tool for tracing a genetic trait through generations of a family.
a) A punnett square
b) A pedigree
c) A selective breed
d) A DNA fingerprint
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) insertions
c) substitutions
d) mutagens
The code for a given amino acid consists of ____________ base(s).
a) one
b) two
c) three
d) four
What materials make up each nucleotide in a DNA molecule?
a) a gene, an allele, and a trait
b) a sugar, a phosphate, and a base
c) chromosomes and genes
d) an amino acid, a base, and a protein
Most genetic disorders, such as sickle cell anemia, are due to a
a) pedigree
b) recessive gene
c) dominant gene
d) ribosome
A complementary strand to the DNA sequence TAGTCA would be
a) ATGAGT
b) GACAGT
c) GTAGAT
d) ATCAGT
Which of the following statements is FALSE?
a) The environment has no influence on a person's trait
b) Several genes may affect a single trait
c) A single gene can affect more than one trait
d) A mutation can affect the traint of an organism
Genetic engineering is currently used to
a) genetically alter plants
b) repair damaged genes
c) manufacture proteins
d) All of the above
What are the three types of mutations?
a) insertion, division, addition
b) substitution, insertion, division
c) deletion, substitution, insertion
d) deletions, insertions, division
All mutations are harmful.
a) True
b) False
c)
d)
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
c)
d)
Rosalind Franklin's X-ray images showed DNA to have a linear shape.
a) True
b) False
c)
d)
In incomplete dominance, each of the two alleles that determine a trait has its own degree of influence.
a) True
b) False
c)
d)
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