Phases of Meiosis & Mitosis EXAM 4

Question 1

1st phase of Mitosis

Prophases

Answer 1

-Chromosomes condense and become visible

Question 2

2nd Phase of Mitosis

Prometaphase

Answer 2

• Chromosomes continue to condense

Question 3

3rd Phase of Mitosis

Metaphase

Answer 3

• Chromosomes are lined up at the metaphase plate

- Each sister chromid is attached to a spindle fiber originating from the opposite poles

Question 4

4th Phase of Mitosis

Anaphase

Answer 4

• Sister chromatids (now called chromosomes) are pulled toward the opposite poles

Question 5

5th phase of Mitosis

Telophase and Cytokines

Answer 5

• Chromosomes arrive at opposite poles and begin to decondense
• Nuclear envelope material surrounds each set of chromosomes
• The result is 2 haploid cell
• Each cell has one duplicated copy of each homologous chromosome pair

Question 6

Subphases of Meiosis I

Prophase I

Answer 6

• Chromosomes condense

- Homogenous chromes bind firmly together along their length

Question 7

Subphases of Meiosis I

Prometaphase I

Answer 7

• Homologous chromosomes are attached to spindle microtubules at the fused kinetochore shared by the sister chromatids
• Chromosomes continue to condense

Question 8

Subphases of Meiosis I

Metaphase I

Answer 8

Homologous chromosomes randomly assemble at the metaphase plate

Question 9

Subphases of Meiosis I

Anaphase I

Answer 9

Spindle microtubules pull the homologous chromosomes apart. The sister chromatids are still attached at the centromere.

Question 10

Subphases of Meiosis I

Telophase I and Cytokinesis

Answer 10

Sister chromatids arrive at the poles of the cell and begin to decondense.
- The end result is 2 haploid cells: each cell has 1 duplicated copy of each homologous chromosome pair

Question 11

Subphases of Meiosis II

Prophase II

Answer 11

• Sister chromatids condense

Question 12

Subphases of Meiosis II

Prometaphase II

Answer 12

The nuclear envelope disappears, and the spindle fiber engage the individual kinetochore on the sister chromatids

Question 13

Subphases of Meiosis II

Metaphase II

Answer 13

Sister chromatids line up at the metaphase plate

Question 14

Subphases of Meiosis II

Anaphase II

Answer 14

Sister chromatids are pulled apart by shortening of the kinetochore microtubules.

Question 15

Subphases of Meiosis II

Telophase II and Cytokinesis

Answer 15

Chromosome arrives at the poles of the cell and decondense.