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WorksheetsMitosis & Meiosis
Total questions: 12
Worksheet time: 6mins
Metaphase of mitosis is characterized by _____.
aligning of chromosomes on the equator
splitting of the centromeres
cytokinesis
separation of sister chromatids
How is plant cell cytokinesis different from animal cell cytokinesis?
The contractile filaments found in plant cells are structures composed of carbohydrates; the cleavage furrow in animal cells is composed of contractile phospholipids.
Plant cells deposit vesicles containing cell-wall building blocks on the metaphase plate; animal cells form a cleavage furrow.
The structural proteins of plant cells separate the two cells; in animal cells, a cell membrane separates the two daughter cells.
Plant cells divide after metaphase but before anaphase; animal cells divide after anaphase.
Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA?
G1
S
G2
M
In the figure above, which number represents DNA synthesis?
I
II
III
IV
V
Cyclin-dependent kinase (Cdk) is _____.
inactive, or "turned off," in the presence of cyclin
present only during the S phase of the cell cycle
the enzyme that catalyzes the attachment of chromosomes to microtubules
an enzyme that attaches phosphate groups to other proteins
For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable?
It is safe enough to limit all apoptosis.
It does not alter metabolically active cells.
It interferes with cells entering G0.
It interferes with rapidly dividing cells.
Which of the following is a true statement about sexual vs. asexual reproduction?
Asexual reproduction, but not sexual reproduction, is characteristic of plants and fungi.
In sexual reproduction, individuals transmit half of their nuclear genes to each of their offspring.
In asexual reproduction, offspring are produced by fertilization without meiosis.
Asexual reproduction produces only haploid offspring.
Independent assortment of chromosomes is a result of _____.
the random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I
the random combinations of eggs and sperm during fertilization
the random distribution of the sister chromatids to the two daughter cells during anaphase II
the diverse combination of alleles that may be found within any given chromosome
Sister chromatids separate from each other during _____.
meiosis I only
meiosis II only
mitosis and meiosis I
mitosis and meiosis II
Which of the following occurs in meiosis but not in mitosis?
chromosome replication
synapsis of chromosomes
alignment of chromosomes at the equator
condensation of chromosomes
Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum from a roundworm?
four
two
eight
a diploid number
The spider mite has a diploid number of four chromosomes. Therefore, following meiosis, each daughter cell will have two chromosomes. Diversity in this species may be generated by mutations and _____.
crossing over
independent assortment
crossing over and independent assortment
nothing else
