Gen. Bio. PPTs: Mitosis (Cell Cycle Cont.)

Question 1

Organisms grow by the addition of cells.

• In multicellular organism some of these cells perform functions different from other cells.

Answer 1

Mitosis

Question 1

4 Main Phases of Mitosis:

Answer 1

Prophase, Metaphase, Anaphase, Telophase

Question 2

Mitosis.
Chromosome condense

Answer 2

Prophase

Question 3

Mitosis.
Microtubules form

Answer 3

Prophase

Question 4

Mitosis.
The nuclear envelope breaks down.

Answer 4

Prophase

Question 5

Prophase. Starts when (a) ________ became visible under light microscope as it condenses into (b) ____________.

Answer 5

a. chromatin
b. discrete chromosome

Question 6

Prophase. The (a) _____________ breaks down and releases the (b) ______________.

Answer 6

a. nuclear envelope
b. chromosomes

Question 7

Prophase. From the centrosomes, the (a) ___________ begin to form, and some (b) _____________ start capturing the chromosomes.

Answer 7

a. mitotic spindle
b. microtubules

Question 8

Mitosis. Chromosomes are pulled to the center of the cell.

Answer 8

Metaphase

Question 9

Metaphase. Lines up along the _________________.

Answer 9

Metaphase Plate

Question 10

Mitosis.
Centromeres divide

Answer 10

Anaphase

Question 11

Mitosis.
(a) __________ pull one set of chromosome to each pole

Answer 11

Anaphase
a. Spindle fibers

Question 12

Mitosis.
(a) ___________ is critical to division. This is the SHORTEST stage in mitosis.

Answer 12

Anaphase
a. Precise alignment

Question 13

Mitosis. The (a) __________ microtubules attached to the centromeres SHORTENS.

Answer 13

Anaphase
a. kinetochore

Question 14

Anaphase. Relative to those previously mentioned. The cell starts to (a) __________ as well.

Answer 14

Elongate

Question 15

Anaphase. The __________ nuclei form in the cell. [The nuclear envelope comes from the pieces of parents’ nuclear envelope.]

Answer 15

two daughter

Question 16

Anaphase. The chromosomes become ________.

Answer 16

less dense

Question 17

Anaphase. To complete the separation, in most animal cells, cytokinesis overlaps with (a) __________. Cytokinesis happens when (b) ____________ is visible.

Answer 17

a. telophase
b. cleavage furrow

Question 18

Mitosis. Nuclear envelopes FORM around chromosomes.

Answer 18

Telophase

Question 19

Mitosis.
Chromosomes uncoil

Answer 19

Telophase

Question 20

Mitosis.
Cytokinesis
* animals - pinching of (a) ___________
* plants - elongates and the (B) __________ forms (future cell wall and cell membrane)

Answer 20

Telophase
a. plasma membrane
b. cell plate