Question

cell cycle
name marcus
block: 1 - 2
date: sep
b (metaphase)
2 spindle fibres
c (anaphase)
d (telophase)

1. what moves the chromatids during mitosis?
2. what anchors the spindle?
3. what are the four phases of mitosis?
4. how many daughter cells are created from mitosis and cytokinesis?
5. in what phase does cytokinesis begin?
6. if a parent cell has 46 chromosomes, how many chromosomes will be in each daughter cell?
7. if a parent cell has 72 chromosomes, how many daughter cells will be created during a single cell cycle?
8. how many chromosomes will the daughter cells have?
9. the nuclear membrane dissolves during what phase?
10. in the cell pictured above, how many chromosomes are present during prophase?

Explanation:

Step1: Recall cell - division knowledge

Mitosis is a type of cell division. The four phases of mitosis are prophase, metaphase, anaphase, and telophase. During mitosis, the genetic material is replicated and divided equally between two daughter cells. Cytokinesis, the division of the cytoplasm, usually begins in anaphase or telophase. In a normal somatic cell division (mitosis), if the parent cell has \(n\) chromosomes, each daughter cell will have \(n\) chromosomes as well because mitosis results in the production of two genetically identical daughter cells.

Step2: Answer the questions

1. The structure that holds the chromatids together is the centromere.
2. The centrosomes organize the spindle.
3. The four phases of mitosis are prophase, metaphase, anaphase, and telophase.
4. Mitosis and cytokinesis result in the creation of two daughter cells.
5. Cytokinesis usually begins in anaphase or telophase.
6. If a cell has 46 chromosomes, each daughter cell will have 46 chromosomes after mitosis.
7. If a cell has 72 chromosomes, each daughter cell will have 72 chromosomes after mitosis.
8. The nuclear membrane dissolves during prophase.

Answer:

1. Centromere
2. Centrosomes
3. Prophase, metaphase, anaphase, telophase
4. Two
5. Anaphase or telophase
6. 46
7. 72
8. Prophase