Question

Want to check answers for my final example questions. Can you please tell me the answers?

1. A cell with a diploid number of 24 would have          pairs of chromosomes and division via mitosis would result in          cells containing          chromosomes each.
   1. 24, 4, 24
   2. 24, 2, 12
   3. 12, 2, 24
   4. 12, 4, 12
   5. 12, 2, 24

2. The main role of mitosis is to:
   1. Generate cellular clones by copying a cell’s DNA and evenly dividing it between two haploid daughter cells.
   2. Increase genetic variability by dividing up the cell’s DNA between two diploid daughter cells.
   3. Increase genetic variability by dividing up the cell’s DNA between four haploid daughter cells.
   4. Generate cellular clones by copying a cell’s DNA and evenly dividing it between two diploid daughter cells.

3. Which of the following statements regarding the cell cycle is false?
   1. G0 is a stage in which cell cycle activity is suspended indefinitely.
   2. A majority of the cell cycle is spent dividing the cell and DNA during mitosis.
   3. The main goal of interphase is to correctly duplicate organelles and DNA.
   4. 90 percent of the cell cycle is spent preparing for division.

4. p53 is an extremely important tumor suppressor. A loss of function mutation in this gene would be expected to cause cancer by:
   1. Decreasing cell cycle activity by increasing production of proteins that inhibit the cell cycle
   2. Increasing cell cycle activity by increasing production of proteins that inhibit the cell cycle
   3. Decreasing cell cycle activity by decreasing production of cyclin proteins
   4. Increasing cell cycle activity by constitutively activating receptor tyrosine kinases
   5. Increasing cell cycle activity by decreasing production of proteins that inhibit the cell cycle

5. Chiasmata form between                    chromosomes driving a process known as       which serves to                     genetic variability in gametes.
   1. Homologous, crossing over, increase
   2. Sister, independent assortment, decrease
   3. Homologous, crossing over, decrease
   4. Sister, crossing over, increase
   5. Homologous, independent assortment, increase

6. Aneuploidies such as trisomy 21 (Down syndrome) are more likely to occur following a nondisjunction event in                 .
   1. Metaphase I
   2. Anaphase II
   3. Prophase II
   4. Anaphase I
   5. Metaphase II

Answer 1