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WorksheetsMitosis/Meiosis College Biology
Total questions: 53
Worksheet time: 13hrs 15mins
Gametes contain ___ the number of chromosomes found in somatic cells.
the same
twice
half
one fourth
Somatic cells are ___, whereas gametes are ___.
haploid, diploid
diploid, polydiploid
polyploidy, haploid
diploid, haploid
An organism is said to be diploid if
it contains genetic info from two parents.
it is multicellular.
it reproduces.
it undergoes mitotic cell division.
What are homologous chromosomes?
The two halves of a replicated chromosome.
Two identical chromosomes from one parent.
Two genetically identical chromosomes, one from each parent.
Two genetically similar chromosomes, one from each parent.
When homologous chromosomes form chiasmata, they are
exchanging genetic info.
reproducing DNA.
separating their sister chromatids.
replicating their chromatids.
Crossing over involves each of the following with the EXCEPTION of
the transfer of DNA between two nonsister chromatids.
the transfer of DNA between two sister chromatids.
the formation of a synaptonemal complex.
the alignment of homologous chromosomes.
Terminal chiasmata are seen during which phase of meiosis?
Anaphase I
Prophase I
Metaphase I
Metaphase II
Which of the following occurs during Anaphase I?
Sister chromatids are separated and move to the poles.
Homologous chromosomes move to the opposite poles.
Homologous chromosomes align at the middle of the cell.
All the chromosomes align independently at the middle of the cell.
Telophase I results in the production of
four cells containing one homologue of each homologous pair.
two cells containing both homologues of each homologous pair.
four cells containing both homologues of each homologous pair.
two cells containing one homologue of each homologous pair.
Which of the following does NOT contribute to genetic diversity?
independent assortment
recombination
metaphase of meiosis II
metaphase of meiosis I
How does S phase following meiosis differ from S phase in mitosis?
DNA replication takes less time because the cell is haploid.
DNA does not replicate during S phase following meiosis I
DNA replication takes more time due to cohesion proteins.
There is no difference.
What occurs during anaphase of meiosis II?
The homologous chromosomes align.
Sister chromatids are pulled to opposite poles.
Homologous chromosomes are pulled to opposite poles.
The haploid chromosomes line up.
What is an aneuploid gamete?
A diploid gamete cell
A haploid gamete cell
A gamete cell with the wrong number of chromosomes
A haploid somatic cell
Which of the following is NOT a distinct feature of meiosis?
Pairing and exchanging of genetic material between homologous chromsomes.
Attachment of sister kinetochores to spindle fibers.
Movement of sister chromatids to the same pole.
Suppression of DNA replication.
Which phase of meiosis I is most similar to the comparable phase in mitosis?
Prophase I
Metaphase I
Anaphase I
Telophase I
Which of the following is NOT involved in binary fission in prokaryotes?
replication of DNA
elongation of the cell
separation of daughter cells by septum formation
assembly of the nuclear envelope
Chromatin is composed of
RNA and protein.
DNA and protein.
sister chromatids.
chromosomes.
What a nucleosome?
Region in cell's nucleus that contains euchromatin.
Region of DNA wound around a collection of histone proteins.
Region of a chromosome made of multiple loops of chromatin.
It is a 30-nm fiber found in chromatin.
How do sister chromatids differ from homologous chromosomes?
Sister chromatids only represent maternal genetic contribution.
Homologous chromosomes = exact copies, but sister chromatids = similar.
Homologous chromosomes = similar, but sister chromatids = exact copies.
Sister chromatids represent only 1/2 the genetic info stored in chromosmes.
What is the role of cohesin proteins in cell division?
Organize DNA of chromosomes into highly condensed structures.
Hold the DNA of the sister chromatids together.
They help the cell divide into two daughter cells.
They hold the microtubules onto the chromosome.
Replication of the organelles of the eukaryotic cell occurs during
interphase.
G1.
S.
G2.
Replicated copies of each chromosome are called ___ and are connected at the ____.
homologues; centromere
sister chromatids; kinetochores
sister chromatids; centromere
homologues; kinetochore
Kinetochores are associated with which of the following on a sister chromatid?
centromere
centriole
condensation
cohesin
Separation of the sister chromatids and elongation of the cell occurs during
prophase.
prometaphase.
anaphase.
telophase.
Why is cytokinesis an important part of cell division?
Responsible for proper separation of genetic info.
Responsible for proper separation of cytoplasmic contents.
Triggers the movement of a cell through the cell cycle.
Responsible for the elongation of the cell.
At which stage in the cell cycle does a cell make a commitment to undergo cell division?
at G1/S checkpoint
at G2/M checkpoint
at spindle checkpoint
at cytokinesis
How is the activity of cyclin-dependent kinases (Cdks) regulated?
presence or absence of cyclins
phosphorylation
growth factors
all of the above
Why is the function of the protein p53 important for preventing cancer?
ensures that chromosomes are properly aligned for anaphase
integrates signals in cell leading to production of cyclins
checks for DNA damage before allowing replication during S phase
functions as phosphatase, removing phosphates to regular Cdk
What is a protooncogene?
Mutant gene associated with cell cycle that leads to cancer
Normal gene that can result in cancer if it becomes mutated
Gene introduced into cell that can cause cancer
Gene that suppresses unregulated cell divisions
Which of the following does NOT occur during mitosis?
packaging of the chromosomes
replication of DNA
separation of sister chromatids
spindle formation
B is:
C is:
B: centromere
C: chromosome
B: chromatid
C: centromere
B: centromere
C: chromatid
B: chromosome
C: chromatid
This is the cell cycle checkpoint that makes sure the correct number of chromosomes are present and attached to microtubules.
G1/S Checkpoint
G2/M Checkpoint
Late Metaphase Checkpoint
I Checkpoint
This is the cell cycle checkpoint that makes sure DNA has been replicated correctly during S phase.
G1/S Checkpoint
G2/M Checkpoint
Late Metaphase Checkpoint
I Checkpoint
This is the cell cycle checkpoint that makes sure environmental conditions are ideal for cell survival.
G1/S Checkpoint
G2/M Checkpoint
Late Metaphase Checkpoint
I Checkpoint
Crossing over involves:
synapsis
formation of a tetrad
alignment of homologous chromosomes
all of the above
The mitotic spindle (microtubules) plays a role in which process?
cytokinesis
condensation of chromatin into chromosomes
dissolving the nuclear membrane
separation of sister chromatids
What two components make an active MPF
a growth factor and a mitotic factor
ATP synthetase and a protease
cyclin and tubulin
cyclin and a cyclin-dependent kinase
opposite ends of the cell. What kind of cell is this?
