Mitosis & Meiosis Pre-Quiz B4

Which outcome would be most likely if a cell failed to undergo cytoplasmic division during mitosis?

• The result would be one cell with no nucleus.

• The result would be two cells each without a nucleus.

• The result would be two cells where one has no nucleus.

• The result would be one cell with two nuclei.

Students viewed the cells in onion root tips using a light microscope. They collected data as shown in the table. What does the data indicate about the cell cycle?

• There are only 36 cells in the tip of an onion root.

• At any given time, most cells will be undergoing mitosis.

• Cells spend most of their time preparing for mitosis.

• Metaphase, anaphase, and telophase are slower processes.

When in the cell cycle does DNA replication take place?

• immediately before mitosis begins

• immediately after mitosis begins

• in the middle of mitosis

• between the cycles of mitosis

Analyze the diagram to answer the question. Which statement is correct about cells C and D?

• Cells C and D are not identical to cell A.

• Cells C and D are not identical to one another.

• Cells C and D are identical to one another but not to cell A.

• Cells C and D are identical to one another and to cell A.

Two different unicellular organisms are reproducing asexually. Which statement describes what is occurring?

• The organisms are producing genetically identical offspring through mitosis.

• The organisms are producing genetically different offspring through mitosis.

• The organisms are producing genetically identical offspring by combining DNA from two parents.

• The organisms are producing genetically different offspring by combining DNA from two parents.

The diploid number of chromosomes for guinea pigs is 64. How many chromosomes will be found in their gametes?

• 16

• 32

• 64

• 128

During meiosis, crossing over usually occurs. Why is this process important?

• It decreases genetic variation.

• It increases genetic variation.

• It changes the number of chromosomes found in the new cell.

• It changes the number of genes found in the new cell.

Bacteria and amoebas both reproduce by binary fission. How does this impact their offspring?

• Offspring will be identical to their parent cells.

• Only small numbers of offspring will be produced.

• The process is slow, so it will take a long time for offspring to be produced.

• The offspring will only have half of the parental genetic information.

Examine the chart that compares asexual and sexual reproduction. What descriptions represent letters Y and Z?

• Y : Meiosis Z : produces genetically identical offspring

• Y : Mitosis Z : produces genetically identical offspring

• Y : Meiosis Z : produces diversity among offspring

• Y : Mitosis Z : produces diversity among offspring

Which description distinguishes the process of meiosis from mitosis?

• Unlike mitotic cells, meiotic cells undergo a single division to halve their chromosome number, after which they undergo crossing over to restore their diploid state.

• Unlike mitotic cells, meiotic cells undergo multiple divisions to produce an effectively unlimited array of daughter cells which are genetically identical to the parent cells.

• Unlike mitotic cells, meiotic cells undergo pairing of homologous chromosomes, allowing centromeres to remain intact throughout both cellular divisions.

• Unlike mitotic cells, meiotic cells undergo two divisions to produce haploid cells, allowing for genetic diversity in sexually reproducing organisms.