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Chapter 8 Test Review
Test Description: Chapter 8 Test
Instructions: Answer all questions to get your test result.
1) _______________ is the failure of chromosomes or chromatids to separate normally during meiosis.
A
crossing over
B
deletion
C
nondisjunction
D
random fertilization
2) The creation of genetically identical offspring by a single parent, without the participation of sperm and egg, is called
A
sexual reproduction
B
meiosis
C
asexual reproduction
D
regeneration
3) Asexual reproduction requires ________ individual(s).
A
5
B
2
C
3
D
1
4) Which of the following helps maintain the structure of chromosomes and control the activity of genes?
A
chromatids
B
nuclear membrane
C
ribosomes
D
proteins
5) Sister chromatids are
A
made only of DNA.
B
unique to prokaryotes.
C
found right after a cell divides.
D
joined together at a centromere.
6) Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called
A
nucleoli.
B
sister chromatids.
C
chromatin.
D
sister chromosomes.
7) ____________________ produces offspring that are similar to the parents, but show variations in traits and involves inheritance of unique sets of genes from two parents
A
mitosis
B
asexual reproduction
C
sexual reproduction
D
regeneration
8) During ____________ the cytoplasmic contents double and chromosomes duplicate in the nucleus .
A
Interphase
B
Metaphase
C
Anaphase
D
Prophase
9) In _______________ microtubules begin to emerge from centrosomes, forming the mitotic spindle.
A
Interphase
B
Telophase
C
Anaphase
D
Prophase
10) During ______________ phase chromosomes align at the cell equator.
A
Metaphase
B
Anaphase
C
Prophase
D
Interphase
11) In animal cells, cytokinesis occurs as a _________________ forms.
A
nuclear envelope
B
cleavage furrow
C
cell plate
D
nucleus
12) Cell division is controlled by ___________ in which crowded cells stop dividing.
A
anchorage dependence
B
Denisty-dependent inhibition
C
growth factors
D
density-independent inhibition
13) A benign tumor differs from a malignant tumor in that a benign tumor
A
is cancerous.
B
does not metastasize.
C
spreads from the original site.
D
never causes health problems.
14) Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are
A
parallel chromosomes.
B
complementary chromosomes.
C
homologous chromosomes.
D
heterologous chromosomes.
15) During which stage of meiosis do synapsis and crossing over occur?
A
metaphase I
B
interphase I
C
prophase II
D
prophase I
16) Karyotyping
A
shows chromosomes as they appear in metaphase of meiosis II.
B
examines points of crossing over.
C
reveals the presence of cancerous genes.
D
can reveal alterations in chromosome number.
17) The loss of a chromosome segment is called
A
a duplication.
B
a deletion.
C
translocation.
D
an inversion.
18) Which of the following statements regarding the differences between mitosis and meiosis is false?
A
In meiosis four daughter cells are produced, whereas in mitosis two daughter cells are produced.
B
In mitosis cytokinesis occurs once, whereas in meiosis cytokinesis occurs twice.
C
Crossing over is a phenomenon that creates genetic diversity during mitosis.
D
Cells produced by mitosis are diploid, whereas cells produced by meiosis are haploid.
19) Both mitosis and meiosis are preceded by
A
Interphase
B
Telophase
C
Anaphase
D
Prophase
20) As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of
A
growth factor inhibition.
B
density-independent inhibition.
C
anchorage independence.
D
density-dependent inhibition.
*select an answer for all questions
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