Mitosis

Question 1

Mitosis stages

Answer 1

Prophase, metaphase, anaphase, telophase (and cytokinesis)

Question 2

Early Prophase

Answer 2

nucleolus disappears, and the chromatin starts to condense, becoming visible. The centrioles separate from each other, and begin to form spindle fibres

Question 3

Late Prophase

Answer 3

nuclear membrane begins to disappear, chromosomes are now visible

Question 4

Metaphase

Answer 4

nuclear membrane is now gone, spindle fibres have fully arrived at the opposite poles of the cell and chromosomes line up along the middle of the cell

Question 5

Anaphase

Answer 5

spindle fibres shorten, and the chromatids of each chromosome are dragged to opposite poles of the cell

Question 6

Telophase

Answer 6

Two nuclei form and each nucleus contains a complete copy of the cell’s DNA

Question 7

Cytokinesis

Answer 7

Cytoplasm and organelles are divided, two seperate cells form

Question 8

Cytokinesis in animal cells

Answer 8

Cytokinesis occurs through a process called cleavage furrow. A contractile ring of actin filaments forms at the cell’s equator that contract inward, pinching the cell membrane.

Question 9

Cytokinesis in plant cells

Answer 9

Due to the rigid cell wall, plant cells cannot undergo cleavage furrow. Instead, they form a cell plate, a structure built from vesicles carrying cell wall materials. The cell plate expands outward, eventually fusing with the existing cell wall, separating the two new cells.