Cell Cycle • Chapter 2.2a

Question 1

Define

Cell Division

Answer 1

Sequence of events within a cell’s lifetime — from one cell division to the next.

Question 2

List

Two main phases of the cell cycle

Answer 2

• Meiotic Phase (M Phase)
• Interphase

(in order of occurence)

Question 3

List

Subphases of the Meiotic (M) Phase

Answer 3

• Nuclear Division (Mitosis or Meiosis)
• Cytokinesis

(in order of occurence)

Question 4

Define

Cytokinesis

Answer 4

Cytoplasmic division.

Question 5

Define

Interphase

Answer 5

The stage of a cell’s life where it is not undergoing cell division.

(Majority of its lifetime)

Question 6

List

Subphases of Interphase

Answer 6

• G1 (Gap 1)
• S (Syntheisis)
• G2 (Gap 2)

(in order of occurence)

Question 7

Explain

What occurs during the G1 phase of interphase?

Answer 7

Cell growth

before DNA replication.

Question 8

Explain

What occurs during the S phase of interphase?

Answer 8

DNA replication — single-chromatid chromosomes are duplicated and paired as sister chromatids (which are also structurally called chromosomes).

Question 9

Explain

What occurs during the G2 phase of interphase?

Answer 9

The cell prepares for division.

Question 10

Define

Mitosis

Answer 10

The asexual reproduction of a cell that produces two diploid (2n) cells.

Used in somatic cells in humans.

Question 11

Define

Meiosis

Answer 11

The sexual reproduction of a cell that produces four haploid (n) cells.

Used in gametogenesis.