Meiosis

Question 1

Prophase 1

Answer 1

Chromosomes appear, thicken and shorten and each has already duplicated.
Two pairs of centrioles become visible, and move to opposite poles of the cell.
Spindle fibres form and chromosomes move towards spindle fibres

Question 2

Metaphase 1

Answer 2

• Chromosomes line up on the spindle fibres at the equator of the cell

Question 3

Anaphase 1

Answer 3

The homologous chromosomes move apart with one member of each pair (consisting of two chromatids) and move to opposite ends of the cell. The centromeres do not divide, the chromatids remain intact

Question 4

Telophase 1

Answer 4

Cytoplasm divides, nuclear membrane reforms to produce two daughter cells, and each cells is now haploid (n).

Question 5

Prophase II

Answer 5

New spindles form at each end of original spindle at right angles and chromosomes gradually move towards the equator.

Question 6

Metaphase II

Answer 6

Chromosomes line up on the spindle fibres at the equator of the cell and the centromere divide so that each chromatid is now a separate chromosome.

Question 7

Anaphase II

Answer 7

The new chromosomes migrate to opposite poles of the cell

Question 8

Telophase II

Answer 8

The spindle disappears and nuclear membrane forms. The cytoplasm divides, so does the remainder of the cell. The cell membrane reforms to produce four daughter cells each with haploid (n) number of chromosomes.