4.6 no. 2

Question 1

What will we learn today?

1. What occurs during prophase?
2. What occurs during metaphase?
3. What occurs during anaphase?
4. What occurs during telophase?
5. When does cytokinesis occur?

Answer 1

1. DNA becomes visible and the nuclear envelope disappears during prophase.
2. Chromosomes are aligned across the center of the cell.
3. Double chromosomes are separated into single chromosomes and single chromosomes migrate to opposite sides of the cell.
4. DNA uncoils and nuclear envelopes reappear. Two new nuclei form and each nucleus contains a complete genome.
5. Cytokinesis begins at the end of mitosis and separates the cell into two daughter cells.

Question 2

Daughter cells contain genomes that are…

mitosis

Answer 2

genetically identical to the parent cell

Question 3

What happens in prophase?

Answer 3

Prophase
* Nuclear envelope begins to disappear
* DNA coils into visible chromosomes
* Fibers begin to move double chromosomes toward the center of the cell

Question 4

What happens in metaphase?

Answer 4

Metaphase
* Fibers align double chromosomes across the center of the cell

Question 5

What happens in anaphase?

Answer 5

Anaphase
* Fibers separate double chromosomes into single chromosomes (chromatids)
* Chromosomes separate at the centromere
* Single chromosomes (chromatids) migrate to opposite sides of the cell

Question 6

What happens in telophase and in cytokinesis?

Answer 6

Telophase:
*Nuclear envelope reappears and establishes two separate nuclei
* Each nucleus contains a complete genome
* Chromosomes will begin to uncoil
Cytokinesis:
Cytokinesis will separate the cell into two daughter cells, each containing identical genomes