Mitosis Unit Test

Answer 1

This test is a comprehensive assessment of your understanding of the process of mitosis.

Section 1: Multiple Choice

1. What is the main purpose of mitosis?
a) To create genetic diversity
b) To repair damaged cells
c) To produce gametes
d) To create new cells for growth and development

2. Which of the following is NOT a phase of mitosis?
a) Prophase
b) Anaphase
c) Metaphase
d) Interphase

3. During which phase of mitosis do the chromosomes line up in the middle of the cell?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase

4. What happens during cytokinesis?
a) The cell grows and prepares for division
b) The spindle fibers separate the chromosomes
c) The cytoplasm divides and two new cells are formed
d) Chromosomes condense and become visible

5. How many cells are produced at the end of mitosis?
a) 1
b) 2
c) 3
d) 4

Section 2: Short Answer

1. Describe the process of mitosis, including all the phases and what happens during each phase.

2. What is the role of the spindle fibers in mitosis?

3. How is cytokinesis different in animal and plant cells?

4. How does mitosis contribute to growth and development in multicellular organisms?

Section 3: Problem Solving

1. A cell with 12 chromosomes undergoes mitosis. How many chromosomes will be in each of the resulting daughter cells?

2. A student observes a cell undergoing mitosis and notices that the chromosomes are not properly aligning in the middle of the cell during metaphase. What phase of mitosis could be affected?

Section 4: Labeling Diagrams

Diagram 1: Label the phases of mitosis on the provided diagram.

Diagram 2: Label the structures involved in mitosis (e.g. centrioles, spindle fibers, chromosomes, etc.) on the provided diagram.

Answer Key:
Section 1:
1. d) To create new cells for growth and development
2. d) Interphase
3. b) Metaphase
4. c) The cytoplasm divides and two new cells are formed
5. b) 2

Section 2:
1. Prophase: Chromosomes condense and become visible, nuclear membrane breaks down, spindle fibers form.
Metaphase: Chromosomes line up in the middle of the cell.
Anaphase: Sister chromatids separate and are pulled to opposite poles of the cell.
Telophase: Chromosomes decondense, nuclear membranes reform, spindle fibers break down.
Cytokinesis: The cytoplasm divides and two new cells are formed.

2. The spindle fibers help to separate the chromosomes during anaphase and pull them to opposite poles of the cell.

3. In animal cells, a cleavage furrow forms and the cell membrane pinches inward to divide the cell. In plant cells, a cell plate forms in the middle of the cell and grows outward to separate the cytoplasm.

4. Mitosis allows for the production of new cells, which contributes to the growth and development of multicellular organisms by creating more cells for tissues and organs to grow and function properly.

Section 3:
1. Each resulting daughter cell will have 12 chromosomes, the same number as the original cell.

2. The phase of mitosis that could be affected is metaphase, where the chromosomes are supposed to align in the middle of the cell. If they are not properly aligning, it could be due to errors in spindle fiber attachment or chromosome movement.

Section 4:
(Diagrams will vary)