Question

4. The following questions dealwith the organization of the genetic material within a cell. Makesimple sketches (or describe) to help you visualize the variousstructures as you answer these questions.

• What is chromatin?

• How is chromatin related to a chromosome?

• The length of a single chromosome is several thousandtimes the diameter of the cell containing it. How is it possible tofit such large structures into a cell?

• What are sister chromatids? What connectsthem?

• Do all cells in your body have the same number ofchromosomes? Explain why.

• What are homologous chromosomes?

• What is the difference between a sister chromatid and achromosome?

• Is the structure only called a chromosome when it is madeup of two sister chromatids? Explain.

5. List the phases of the cell cycle anddescribe the sequence of events that occurs during eachphase. Use the masteringbio website, chapter 12,activity 2 (The cell cycle), more important is activity 3 (Mitosisand cytokinesis animation). Greatreview!