Unit 1 S2 Biology – Chromosomes and InheritanceCheck for UnderstandingName

Directions: Before class discussion, answer each multiple choice question using what you already know. During class discussion, write the correct answer in the after box and take notes to support each question.

  1. Which is a reason cells divide?
A. To have a smaller surface area
B. To stop binary fission
C. To prevent tumor formation
D. To reproduce
My Answer / Correct Answer / Notes
  1. What happens during S phase?

A. Cytoplasm is manufactured.

B. DNA separates into two nuclei.

C. The cell splits in two.

D. Chromosomes are duplicated.

My Answer / Correct Answer / Notes
  1. What happens during telophase?
A. A new nucleus forms around each copy of DNA
B. The mitotic spindle forms.
C. The chromatids are pulled apart.
D. Spindle fibers attach to the chromatids.
My Answer / Correct Answer / Notes
  1. A mitosis inhibitor is a medication that is designed to prevent mitosis in certain cells. How could these be helpful in the treatment of tumors?
A. It would force the cells into binary fission.
B. It would force the tumors to enter telophase.
C. It would prevent carcinogens from entering the cell.
D. It would prevent tumor cells from reproducing.
My Answer / Correct Answer / Notes
  1. Which best describes a tetrad?

A. Four chromatids

B. A haploid cell

C. Two gametes

D. A diploid cell

My Answer / Correct Answer / Notes
  1. What happens in meiosis during telophase II?

A. A total of four daughter cells form.

B. The mitotic spindle forms.

C. DNA doubles to produce sister chromatids.

D. Two diploid cells are produced.

My Answer / Correct Answer / Notes
  1. What happens in meiosis during telophase I?

A. Two haploid cells are formed.

B. Four haploid cells form from each parent cell.

C. Sister chromatids are pulled apart.

D. Four tetrads form in the center of the cell.

My Answer / Correct Answer / Notes
  1. When meiosis is complete, what has been produced?

A. Two diploid cells

B. Four diploid cells

C. Two haploid cells

D. Four haploid cells

My Answer / Correct Answer / Notes
  1. Why does meiosis produce cells with fewer chromosomes?

A. Sexual reproduction joins two cells that each have half the total chromosome number.

B. It saves energy for the organism to produce fewer chromosomes.

C. Most of an organism's chromosomes are not useful to the organism.

D. Telophase destroys most of the chromosomes to save time.

My Answer / Correct Answer / Notes