Meiosis

Question 1

Prophase 1

Answer 1

Chromosomes condense (supercoil) to make the replicated sister chromatids visible, centrosomes move to opposite sides and begin forming spindle fibers. Crossing over occurs. Homologous chromosomes pair. Nuclear membrane begins to break down.

Question 2

Metaphase 1

Answer 2

Homologous pairs align at the equatorial plane. Their alignment is random which makes the process called independent assortment.

Question 3

Anaphase 1

Answer 3

Spindle fibers (made from microtubules) pull the homologous chromosomes apart towards the centrosomes.

Question 4

Telophase 1 + Cytokinesis

Answer 4

Two haploid cells are formed with two chromosomes (two sister-chromatids) each. Cytokinesis - Cells split.

Question 5

Prophase 2

Answer 5

Nuclear membrane breaks down, centrosomes move to opposite poles, spindle fibers begin to form.

Question 6

Metaphase 2

Answer 6

Sister Chromatids line up on equatorial plane.

Question 7

Anaphase 2

Answer 7

Sister Chromatids split, creating 8 individual chromosomes.

Question 8

Telophase 2 + Cytokinesis

Answer 8

Two haploid cells are formed with two chromosomes (two chromatids) each. Cytokinesis - Cells split.

Question 9

Centrosome

Answer 9

origin of spindle fibers

Question 10

Centromere

Answer 10

Question 11

Chiasmata

Answer 11

Question 12

Sister Chromatids

Answer 12

Question 13

Homologous Chromosomes

Answer 13

Question 14

Chromatids

Answer 14

Question 15

Spindle Fibers

Answer 15

Question 16

Independant Assortment

Answer 16

Random alignment of chromatids on the equatorial plane