Download 1 BI 112 Instructor: Waite Final Unit Practice Exam 1) Which of the

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BI 112
Instructor: Waite
Final Unit Practice Exam
1) Which of the following is one of the primary reasons for cell division in NORMAL physiology of
an organism?
a) Mutations
b) Cancer
c) Replacement
d) Fission
2) During interphase, cells…
a) Grow
b) Replicate DNA
c) Prepare for cell division
d) All of the above
3) Mitosis and meiosis both begin with…
a) DNA replication
b) Chromosomes lining up at the metaphase plate
c) Dissolving of the nuclear envelope
d) Cytokinesis
4) The purpose of cell cycle checkpoints is…
a) To keep cells small
b) To make sure that cells are healthy before they divide
c) To make cells specialized
d) To help cells differentiate
5) The type of cell division used when an embryo with 4 cells grows to an embryo with 8 cells is…
a) Mitosis
b) Meiosis
c) Metaphase
d) Morphogenesis
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BI 112
Instructor: Waite
Final Unit Practice Exam
6) How many sister chromatids are in one chromosome?
a) 1
b) 2
c) 3
d) 4
7) A cell that has completed the “S” phase of the cell cycle will have how many chromosomes?
a) 23
b) 46
c) 92
d) 184
8) Meiosis involves 2 rounds of cell division. A cell that is preparing to enter the second round of
division will have how many chromosomes?
a) 23
b) 46
c) 92
d) 184
9) During meiosis, crossing over occurs in a structure called the…
a) Gamete
b) Chromosome
c) Metaphase plate
d) Tetrad
10) Edward’s syndrome, Patau Syndrome, Down Syndrome, Turner Syndrome, and Klienfelter
Syndrome are all genetic abnormalities caused by…
a) Chromosome non-disjunction
b) Mutations
c) Recombination
d) DNA replication
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BI 112
Instructor: Waite
Final Unit Practice Exam
11) Different forms of the same gene present in the population are known as…
a) Heterozygotes
b) Alleles
c) Mutations
d) Recessive
12) A form of a given gene that is expressed when only one copy is present, regardless of other
forms of the gene that may be present, is known as…
a) Recessive
b) Heterozygote
c) Dominant
d) Homozygote
13) Two alternative forms of a gene for height exist. They are known as tall (T) and short (t). Tall
is dominant. An individual that is heterozygous for this gene would have what genotype?
a) TT
b) Tt
c) tt
d) Tall
14) Two alternative forms of a gene for height exist. They are known as tall (T) and short (t). Tall
is dominant. An individual that is heterozygous for this gene would have what phenotype?
a) Tall
b) Short
c) Tt
d) TT
15) Two alternative forms of a gene for height exist. They are known as tall (T) and short (t). Tall
is dominant. A male with the genotype TT has a child with a female with the genotype Tt.
What is the probability that the child will be heterozygous for this trait?
a) 25%
b) 50%
c) 75%
d) 100%
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BI 112
Instructor: Waite
Final Unit Practice Exam
16) Cystic fibrosis is an autosomal recessive disorder. A child with cystic fibrosis is born to two
healthy individuals. Which of the following statements must be true?
a) The mother, but not the father, must be a carrier
b) Only one parent is a carrier, but it is impossible to say which one
c) Both parents must be carriers
d) The parents are healthy and cannot be carriers; the disease must have come from a
novel mutation
17) Hemophilia is an X-linked disorder. A child with hemophilia is born to two
healthy individuals. Which of the following statements must be true?
a) The mother, but not the father, must be a carrier
b) Only one parent is a carrier, but it is impossible to say which one
c) Both parents must be carriers
d) The parents are healthy and cannot be carriers; the disease must have come from a
novel mutation
18) A cow that is homozygous for red coat color mates with a bull that is homozygous for white
coat color. The resulting calf has a mixture of both red and white regions in its coat. This is an
example of…
a) Incomplete dominance
b) Codominance
c) Homozygosity
d) Genotype
19) Genes that are on different chromosomes are not inherited together with any consistent
probability. This is due to…
a) Independent assortment
b) Recombination
c) Tetrads
d) Crossing over
20) Consider a sex-linked recessive trait. Which of the following crosses would produce male and
female offspring with different phenotypes?
a) Homozygous unaffected female x unaffected male
b) Affected female x affected male
c) Affected female x unaffected male
d) Heterozygous unaffected female x affected male