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Cellular Reproduction Test
1. A cell of a specific organism contains 64 chromosomes. However, some cells in that
organism may contain only 32 chromosomes as a result of
A) meiotic cell division
C) mitotic cell division
B) transcription
D) translation
2. Which diagram most correctly represents the process of mitosis?
3. Which statement best describes a major difference between cell division in plant and
animal cells?
A. In plant cells, centrosomes have a distinct role in spindle formation, while in animal
cells centrosomes do not function during cell division.
B. In animal cells, replication of chromosomes occurs during the non-dividing phase,
while in plant cells replication occurs when the nuclear membrane disintegrates.
C. In animal cells, division of the cytoplasm is accomplished by a "pinching in" of the
cell membrane, while in plant cells a cell plate is formed.
D. In plant cells, division of the cytoplasm is accomplished by a "pinching in" of the cell
membrane, while in animal cells a cell plate is synthesized.
4. Cancer is a disease in which some cells have lost their ability to control their
A. size
C. growth rate
B. spindle fibers
D. surface area
5. By the end of what phase should the nuclear envelope be dissembled
A. metaphase
C. prophase
B. cytokinesis
D. oogenesis
6. The diagram below represents the sequence of events in a cell undergoing normal
meiotic cell division.
Which diagram most likely represents stage D of this sequence?
7. Which of the following is NOT an example of asexual reproduction performed by
prokaryotes
A. binary fission
C. conjugation
B. budding
D. mitosis
8. This disease is caused by having three copies of chromosome 21, instead of the usual
two.
A. Downs syndrome
C. Leukemia
B. Turner’s syndrome
D. GBS (Group B Strep)
9. Imagine that you are looking at a eukaryotic cell in the microscope. When you
examine the cell, you see that the nucleus is not present and chromosomes are condensed
and lined up independently in the center of the cell. What is/are the possible stage(s) of
division you might be observing in this cell?
A. metaphase of mitosis
C. metaphase of meiosis I
B. metaphase of meiosis II
D. metaphase of mitosis or meiosis I
10. A somatic cell has this ploidy level.
A. 2n
C. 4n
B. 3n
D. 1n
11. Do all species have the same number of chromosomes?
A. true
B. false
12. In animal cells, cytokinesis begins with what important step?
A. spindle fibers disappearing
C. the cell membrane pinches inward
B. analogs begin replicating
D. midline of cell plate forms
13. During what part of the cell cycle in eukaryotes does the cell grow to its mature size?
A. prophase
C. S
B.G2
D. G1
14. What events are responsible for the genetic variability seen in meiosis?
a. The direction in which a parental chromosome faces during metaphase I is random.
b. Homologous chromosomes exchange DNA with one another.
c. Homologous chromosomes exchange RNA with one another.
d. Both the first and second answers are correct.
15. Which of the following is a difference between sexual and asexual reproduction?
a. Asexual reproduction produces greater genetic variation than sexual reproduction.
b. Asexual reproduction allows genes to be mixed up more readily than sexual
reproduction.
c. Asexual reproduction produces genetically identical cells unlike sexual reproduction
d. Asexual reproduction cannot contribute to the growth of multicellular organisms, but
sexual reproduction can.
16. Polar bodies are produced in the production of these gametes
A. spermatogenesis
C. prophase II
B. egg cells
D. DNA
17. How does a checkpoint during mitotic cell division obtain errors?
A. the DNA substase stops working
C. the RNA changes direction
B. the oxytocin becomes irregular
D. the genes obtain a mutation
18. Suppose an animal with 38 diploid chromosomes is able to produce offspring with an
animal that has 60 diploid chromosomes. What is the diploid number of chromosomes
that the offspring would receive from each parent?
A. 19 and 30
C. 38 and 30
B. 19 and 60
D. 76 and 120
19. This term is used to describe the process when chromosomes line up next to its
homologue.
A. tetrad
C. synapsis
B. mitotic spindle
D. crossing-over
20. This type of spindle fiber attaches to the centromere of the chromosome during cell
division.
A. polar fibers
C. centrioles fibers
B. kinetochore fibers
D. plastron fibers
Fill-in-the-Blank (7pts.)
1. Sexual reproduction is an evolutionary advantage because it enables species to
_______________________ rapidly and efficiently to new environmental conditions.
2. Adult stem cells are ______________________to locate in the body and often have a
_______________________ life span than embryonic stem cells.
3. The first checkpoint, (G1), occurs right before the DNA is
________________________during interphase.
4. There are__________________autosomes and ________________________sex
chromosomes in humans and animals.
5. ________________________is less tightly coiled DNA; which occurs in between cell
divisions.
6. Look at the image below. Label the different parts of this chromosome. (2pts.)
A.___________________________
B. ___________________________
7. Look at the image below. What phase of cell division is shown and briefly explain
what is happening in this particular phase. (2pts.)
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
_______________________________________________________________________
8. Draw out the 4 phases of mitosis and briefly explain what is occurring at each phase.
(4pts)