Phases of Meiosis

Question 1

Interphase I

Answer 1

• Chromosomes replicate.
• Chromosomes consist of 2 identical sister chromatids.

Question 2

Prophase I

Answer 2

• Chromosomes condense & come together in homologous pairs (synapsis).
• Because each pair is composed of 4 chromatids, they form a tetrad.
• Crossing over occurs & permits the exchange of genetic material between homologous pairs.
• Nuclear membrane disintegrates.

Question 3

Metaphase I

Answer 3

• pairs of homologous chromosomes (homologues) line up at the equator.

Question 4

Anaphase I

Answer 4

• Homologues separate, one of each pair going to each pole of the cell.
• Sister chromatids do not separate.

Question 5

Telophase I

Answer 5

• Two clusters of chromosomes have formed, each containing one member of each pair of homologues.
• Cytokinesis occurs.

Question 6

Interphase II

Answer 6

• Chromosomes replicate.
• Chromosomes consist of 2 identical sister chromatids.

Question 7

Prophase II

Answer 7

• Chromosomes have relaxed after telophase.
• They recondense.
• Spindles re-form.

Question 8

Metaphase II

Answer 8

• Chromosomes line up along the equator, with each sister chromatids of each chromosome attached to one spindle fiber.

Question 9

Anaphase II

Answer 9

• Sister chromatids separate and are now individual chromosomes.
• Move towards opposite poles.

Question 10

Telophase II

Answer 10

• nuclei form at opposite poles of the cell.
• at the end have 4 unique daughter cells with a haploid number of unreplicated chromosomes.