Semester Exam: Mitosis phases

Question 1

cell division

Answer 1

Mitosis—four stages of nuclear division

Cytokinesis—division of cytoplasm by cleavage furrow

Question 2

Mitosis stages

Answer 2

Prophase
Metaphase
Anaphase
Telophase

Question 3

Prophase

Answer 3

Chromosomes become visible
Centrosomes separate and migrate toward opposite poles
Mitotic spindles form
Nuclear envelope fragments
Kinetochore microtubules attach to kinetochore of centromeres

Question 4

metaphase

Answer 4

Centromeres of chromosomes are aligned at the equator

Question 5

Anaphase

Answer 5

Shortest phase
Centromeres of chromosomes split simultaneously—each chromatid now becomes a chromosome
Chromosomes (V shaped) are pulled toward poles by motor proteins of kinetochores

Question 6

Telophase

Answer 6

The two sets of chromosomes uncoil to form chromatin
New nuclear membrane forms around each chromatin mass
Nucleoli reappear
Spindle disappears

Question 7

Cytokinesis

Answer 7

Ring of actin microfilaments contracts to form a cleavage furrow
Two daughter cells are pinched apart, each containing a nucleus identical to the original