Question

why?
living things must grow and develop. at times they suffer injuries or damage, or cells simply wear out.
new cells must be formed for the organism to survive. what process must occur to make a new, properly-
functioning cell?
model 1 - mitosis as part of the cell cycle

1. refer to model 1. list the four phases in the mitosis process.
2. where is mitosis in the cell cycle? before and after
3. what three phases of the cell cycle are considered interphase?
4. refer to the cell cycle shown.

a. how many cells are present at the beginning of mitosis?
b. how many cells are present at the end of mitosis?

Explanation:

1. The four phases of mitosis are clearly labeled in Model 1.
2. Mitosis is a part of the cell cycle. Cytokinesis (cytoplasmic division) occurs after mitosis, and interphase (where the cell prepares for division) occurs before.
3. Interphase consists of three phases where the cell grows and replicates DNA.
4. a. Mitosis starts with one cell (the parent cell).

b. Mitosis results in two daughter cells.

Answer:

1. Prophase, Metaphase, Anaphase, Telophase
2. Cytokinesis; Interphase
3. \(G_1\) (Gap 1), \(S\) (Synthesis), \(G_2\) (Gap 2)
4. a. 1 cell

b. 2 cells