2. How Meiosis I Works
Prophase I is where chromosomes become
visible, crossing over occurs, the nucleolus
disappears, the meiotic spindle forms, and the
nuclear envelope disappears.
3. Metaphase I
Metaphase I is where the pairs of
chromosomes (bivalents) become aranged on
the metaphase plate and are attached to the
now fully formed meiotic spindle.
4. Anaphase I
Anaphase I is where the two chromosomes in
each bivalent seperate and migrate toward
opposite poles.
5. Telophase I
Telophase I is where the homologous
chromosome pairs reach the poles of the cell,
nuclear envelopes form around them, and
cytokinesis follows to produce two cells.
7. Prophase II
Prophase II is where the nuclear envelope
breaks down and the spindle apparatus forms.
8. Metaphase II
Metaphase II is where the chromosomes
become arranged on the metaphase plate,
much as the chromosomes do in mitosis, and
are attached to the now fully formed spindle.
9. Anaphase II
The centromeres separate and the sister
chromatids—now individual chromosomes—
move toward the opposite poles of the cell.
10. Telophase II
Telophase II is where a nuclear envelope
forms around each set of chromosomes and
Cytokinesis occurs, producing four daughter
cells, each with a haploid set of chromosomes.
