Mitosis, Meiosis & Crossing over Test Review

A patient who has been diagnosed with cancer has been given a blood test in order for their

doctor to investigate their genetic code. What information from the test would help confirm the

patient's cancer diagnosis?

• data indicating somatic cell production is being inhibited by the patient's cancer cells

• data indicating there is a genetic mutation in a protein controlling the patient's cell’s cycle

• data indicating gametes are becoming diploid cells due to the introduction of cancerous

  cells

• data indicating that cells are increasing their chromosome number due to the occurrence of cancer cells

Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a cancerous

tumor cell. How does the presence of an oncogene lead to the formation of a cancerous

tumor?

• Gamete cells become diploid cells.

• Diploid cells become haploid cells.

• Cell division becomes unregulated.

• Somatic cell growth becomes controlled.

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NGSS.HS-LS3-2

Figure 1 shows various types of enzymes and the reaction they catalyze.

If a mutation were to occur in a gene that codes for one of the enzymes, which one would lead to cancer?

• Lipase

• Trypsin

• Phosphofructokinase

• Cyclin-Dependant Kinase

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NGSS.HS-LS3-2

Helicase is an enzyme responsible for unwinding the double helix of the DNA during DNA

replication. In which phase of the cell cycle is helicase performing this function?

• S

• M

• G1

• G2

The chart below shows the count of cells for each phase of the cell cycle in a leaf.

Based on the data table, which of the following would be a valid conclusion about the amount of time that a cell spends in a phase

during the cell cycle?

• The cell spends the most amount of time in the mitotic phase because the cell needs to take its time when dividing the

  nucleus.

• The cell spends the least amount of time in interphase because the cell completes the long process of replicating its DNA

  prior to interphase.

• The cell spends the most amount of time in interphase because the cell only goes through mitosis during periods of growth

  or repair for the organism.

• The cell spends the least amount of time in the mitotic phase because the cell divides the nucleus during interphase leaving

  only growth to occur in mitosis.

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NGSS.HS-LS1-4

Below is an image of a cell performing cellular division.

Which phase has not occurred?

• Metaphase

• Anaphase

• Telophase

• Cytokinesis

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NGSS.HS-LS1-4

Which of the following images correctly identifies the results of meiosis, including crossing over

and independent assortment?

• 
• 
• 
• 

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NGSS.HS-LS3-2

The diagram shows the results of meiosis. The parent cell has one pair of chromosomes. The

locations of three genes - A, B, D, are shown on each chromosome.

Why are the chromosomes in two of the sex cells different from the chromosomes in the parent

cell?

• A mutation occurred during replication.

• Crossing over occurred in the chromosome.

• Some of the genes were damaged during replication.

• Chromosomes from another species were introduced.

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NGSS.HS-LS3-2

NGSS.HS-LS3-1

A Zea mays seed has 20 chromosomes in their genome. Which statement would describe a

gametic cell from Zea mays produced at the end of meiosis?

• The new daughter cells will each have 10 chromosomes, each cell will be genetically

  different.

• At the end of meiosis, there will be four unique daughter cells, each containing 5

  chromosomes.

• The resulting cells will have 40 chromosome pairs in each new daughter cell in order to

  maintain the correct chromosome number.

• Because DNA replication does not change chromosome number, meiosis will result in

  identical daughter cells that each have 20 chromosomes.

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NGSS.HS-LS3-2

Figure 1 above, shows reproduction of a human cell.

Which of the following accurately labels each step in this process?

• 
• 
• 
• 

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