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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
random fertilization
D
nondisjunction
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
regeneration
D
asexual reproduction
3) Asexual reproduction requires ________ individual(s).
A
3
B
5
C
1
D
2
4) Which of the following helps maintain the structure of chromosomes and control the activity of genes?
A
nuclear membrane
B
proteins
C
chromatids
D
ribosomes
5) Sister chromatids are
A
unique to prokaryotes.
B
found right after a cell divides.
C
joined together at a centromere.
D
made only of DNA.
6) Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called
A
sister chromosomes.
B
sister chromatids.
C
chromatin.
D
nucleoli.
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
sexual reproduction
B
regeneration
C
asexual reproduction
D
mitosis
8) During ____________ the cytoplasmic contents double and chromosomes duplicate in the nucleus .
A
Anaphase
B
Metaphase
C
Interphase
D
Prophase
9) In _______________ microtubules begin to emerge from centrosomes, forming the mitotic spindle.
A
Prophase
B
Anaphase
C
Telophase
D
Interphase
10) During ______________ phase chromosomes align at the cell equator.
A
Prophase
B
Interphase
C
Metaphase
D
Anaphase
11) In animal cells, cytokinesis occurs as a _________________ forms.
A
cleavage furrow
B
cell plate
C
nuclear envelope
D
nucleus
12) Cell division is controlled by ___________ in which crowded cells stop dividing.
A
Denisty-dependent inhibition
B
density-independent inhibition
C
growth factors
D
anchorage dependence
13) A benign tumor differs from a malignant tumor in that a benign tumor
A
spreads from the original site.
B
is cancerous.
C
does not metastasize.
D
never causes health problems.
14) Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are
A
homologous chromosomes.
B
heterologous chromosomes.
C
complementary chromosomes.
D
parallel chromosomes.
15) During which stage of meiosis do synapsis and crossing over occur?
A
metaphase I
B
prophase I
C
prophase II
D
interphase I
16) Karyotyping
A
shows chromosomes as they appear in metaphase of meiosis II.
B
reveals the presence of cancerous genes.
C
examines points of crossing over.
D
can reveal alterations in chromosome number.
17) The loss of a chromosome segment is called
A
translocation.
B
a deletion.
C
a duplication.
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
Cells produced by mitosis are diploid, whereas cells produced by meiosis are haploid.
C
Crossing over is a phenomenon that creates genetic diversity during mitosis.
D
In mitosis cytokinesis occurs once, whereas in meiosis cytokinesis occurs twice.
19) Both mitosis and meiosis are preceded by
A
Prophase
B
Interphase
C
Anaphase
D
Telophase
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
density-independent inhibition.
B
density-dependent inhibition.
C
anchorage independence.
D
growth factor inhibition.
*select an answer for all questions
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