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