Transcript Chapter_15_Review_Game

Chapter 15
Cytogenetic is
1. A photographic representation of chromosome.
2. The field of genetics that involves the
microscopic examination of the chromosomes
and cell division.
3. The sorting process to divide one cell nucleus
into two nuclei.
4. The process by which the haploid cells are
produced from a cell that was originally diploid.
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DNA associates very tightly with
nucleosomes because
1. DNA can form covalent bonds with histone
proteins.
2. negative charges on DNA are attracted to
positive charges of the histone proteins.
3. the histone tails wrap tightly around the DNA
double helix.
4. the amino acids of histone proteins are largely
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acidic, while DNA molecules are basic.
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During metaphase,
1. heterochromatin is converted to
euchromatin.
2. chromosomes are about 30 nm wide.
3. chromosomes are much shorter than they
were in interphase.
4. chromosomes undergo gene transcription.
5. the "beads on a string" structure is visible.
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Which of the following statements is
correct about the cell cycle?
1. The cell cycle is a sequence of replication and
division that produces a new cells.
2. The phase of the cell cycle are G1, S, and M
phases.
3. In actively dividing cells, the S and G2 phases
are collectively known as interphase.
4. When the S phase of the cell cycle is finished, a
cell actually has twice as many chromatids as
the number of chromosomes in the G1 phase. 10
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Humans have __________
different types of autosomes.
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2.
3.
4.
5.
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Consider an organism whose karyotype
shows it to have a total of 60
chromosomes. How many
chromosomes would be contained in
the sperm of this organism?
1.
2.
3.
4.
5.
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30
46
60
90
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Which of the following statements is
incorrect concerning sister
chromatids?
1. The formation of sister chromatids doubles
the amount of DNA in a cell.
2. Sister chromatids consist of two identical
copies of a single homologue.
3. Sister chromatids are held together at the
centromere by kinetochore proteins.
4. Sister chromatids separate during telophase.
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Which of the following is not a part of
the mitotic spindle apparatus in plants?
1.
2.
3.
4.
5.
Centrosome
Centriole
Tubulin protein
Kinetochore microtubules
Astral microtubules
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Place the following events of mitosis in the
correct order.
I. Sister chromatids align on the metaphase plate.
II. The cleavage furrow forms.
III. The nuclear membrane breaks up.
IV. Sister chromatids condense.
V. Sister chromatids separate.
1. I, II, III, IV, V
2. III, IV, I, V, II
3. IV, III, I, V, II
4. III, II, I, IV, V
5. IV, I, III, V, II
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The process by which haploid cells are
produced from diploid cells is called
1.
2.
3.
4.
5.
sexual reproduction.
mitosis.
fertilization.
meiosis.
reduction.
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The formation of the bivalent during
meiosis
1. is required for the pairing of homologous
chromosomes.
2. contributes to the genetic diversity of a
species.
3. aids the alignment of sister chromatids in a
single row along the metaphase plate.
4. occurs during meiosis II.
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At the end of meiosis I
1.
2.
3.
4.
5.
cells are haploid.
cells are diploid.
sister chromatids are in separate cells.
the homologous pairs are in separate cells.
the cells are haploid and the homologous
pairs are in separate cells.
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The major way that meiosis II differs
from mitosis is that
1. in meiosis II, the homologous sister
chromatids align at the metaphase plate as a
tetrad.
2. in meiosis II, a pair of sister chromatids
move to the pole.
3. in meiosis II, the cells are haploid.
4. in meiosis II, a synaptonemal complex is
formed.
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In a haploid dominant species
1. the multicellular organism is diploid and the
gametes are haploid.
2. the multicellular organism is haploid and the
gametes are diploid.
3. diploid cells are produced by mitosis and
haploid cells are produced by meiosis.
4. the zygote is haploid.
5. the multicellular organism is haploid and the
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zygote is diploid.
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You prepare the first ever karyotype of an endangered
species of frog. Upon examination you find that all the
chromosomes are metacentric. This is going to make it
difficult to identify
1.
2.
3.
4.
5.
which is the p arm of the chromosome.
which is the q arm of the chromosome.
the unique G banding for each chromosome.
if the chromosomes are telocentric.
both the p and q arms of the chromosome.
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Horses and donkeys are closely related species that
can interbreed. However, the offspring produced are
usually sterile and cannot reproduce. What term
would best describe the offspring from this mating?
1.
2.
3.
4.
Alloploid
Euploid
Trisomic
Polyploid
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Consider a cell in which all of the
homologous chromosomes experience
nondisjunction during meiosis I. What
would be the result of this event?
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2.
3.
4.
5.
two polyploid gametes
one trisomic and three monosomic gametes
four aneuploid gametes
four monosomic gametes
four aneuploid gametes: one trisomic and
three monosomic
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Most human embryos that are
aneuploid
1. result in Down's syndrome.
2. result in sterility.
3. are spontaneously aborted in the first
trimester.
4. can develop and survive to adulthood.
5. are usually the result of increased
nondisjunction in the gametes of older men.
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The centromere
1. is a region of DNA where sister chromatids
associate.
2. is a group of proteins that attach to the
kinetochore.
3. is only present when chromosomes are
highly compacted.
4. is a group of proteins that attach to the
mitotic spindle.
5. is not present on the chromosomes of the
daughter cells until the S phase.
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A species that has three sets of
homologous chromosomes can have up
to _ different combinations of
chromosomes in the gametes.
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