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A Level Biology: Topic 2 (Edexcel) > Mitosis > Flashcards

Flashcards in Mitosis Deck (23):
1

Is it sexual or asexual reproduction?

Asexual

2

What are the phases of cell division?

Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

3

What is the first stage of cell division?

Interphase

4

What are the parts of interphase?

G1
S
G2

5

What is the G1 part of interphase?

The cell perfroms normal functions and grows from it's last division to normal size

6

What is the S part of interphase?

The chromasomes replicate and become double stranded chromatids

7

What is the G2 part of interphase?

Organelles and other materials needed are synthesized so there is 2 of everything

8

What are cyclin-dependant kinases?

Enzymes involved in controlling the cell cycle

9

What is the second stage of cell division?

Prophase

10

What happens during prophase?

The chromasomes coil up- each chromasome consists of two daughter chromatids joined at the centromere
Nucleous breaks down and centrioles pull apart to form spindle fibres

11

What is the third stage of cell division?

Metaphase

12

What happens during metaphase?

The centrioles move to opposite poles and the chromatids line up along the equator

13

What is the fourth stage of cell division?

Anaphase

14

What happens during anaphase?

The centromeres break and the chromasomes are pulled towards opposite poles of the cell

15

What is the fifth stage of cell division?

Telophase

16

What happens during telophase?

The spindle fibres break down and the chromasomes and nuclear envelope reform
Chromasomes unravel

17

What is the last stage of cell division?

Cytokenesis

18

What happens during cytokenesis?

Contractile fibres pinch off the membrane to form two seperate cells

19

What are the different types of asexual reproduction?

Producing spores
Regeneration
Budding
Propagation

20

How do plants reproduce by producing spores?

Sporulatio where spores are releaced that are each capable of growing into a new plant and can be spread over great distances

21

How do things reproduce by regeneration?

Organisms can replace body parts that have been lost by taking a clone from their surviving tissue

22

How do things reproduce by budding?

There is an outgrowth from the parent individual of a smaller but identical thing. It eventually detatches and lives independently

23

What is the most accurate way of measuring the growth of an organism?

Dry mass