Question

meiosis: stages of meiosis - meiosis ii
name each phase of the second meiotic division and drag & drop the descriptions:
the spindle fibers
contract,
separating the
sister chromatids
and pulling them
to opposite ends
of the cell.
the spindle fibers
have formed and
the chromosomes
line up along the
middle of the cell.
a nuclear
envelope reforms
at each pole and
then cytokinesis
divides the cell
into two. each cell
is haploid. the
chromosomes will
decondense.
the nuclear
envelope breaks
down. pairs of
centrioles (also
known as
centrosomes)
start to move to
opposite poles.

Explanation:

1. First Phase (leftmost): The nuclear envelope breaks down, centrosomes move to poles. This matches the start of Meiosis II, called Prophase II.
2. Second Phase: Spindle fibers form, chromosomes line up at the cell's middle. This is Metaphase II.
3. Third Phase: Spindle fibers contract, separating sister chromatids to opposite poles. This is Anaphase II.
4. Fourth Phase (rightmost): Nuclear envelopes reform, cytokinesis creates haploid cells with decondensing chromosomes. This is Telophase II (and Cytokinesis).

Answer:

1. First dashed box: Prophase II

• Matches description: "The nuclear envelope breaks down. Pairs of centrioles (also known as centrosomes) start to move to opposite poles."

1. Second dashed box: Metaphase II

• Matches description: "The spindle fibers have formed and the chromosomes line up along the middle of the cell."

1. Third dashed box: Anaphase II

• Matches description: "The spindle fibers contract, separating the sister chromatids and pulling them to opposite ends of the cell."

1. Fourth dashed box: Telophase II (and Cytokinesis)

• Matches description: "A nuclear envelope reforms at each pole and then cytokinesis divides the cell into two. Each cell is haploid. The chromosomes will decondense."