The cell cycle

Question 1

Interphase

Answer 1

Chromosomes exist unravelled, chromosomes duplicate, cell undertakes normal cellular function

Question 2

Prophase

Answer 2

Chromosomes condense ( short and fat) visible under microscope, centrioles form spindle fibres. Nuclear envelope disappears

Question 3

Metaphase

Answer 3

Chromosomes line up along middle, along equator and spindle fibres attach to centromeres of chromosomes

Question 4

Anaphase

Answer 4

Spindle fibres contract and pull chromosomes apart. Centromere divided, each chromatid at poles of of spindle.

Question 5

Telophase

Answer 5

Sets of separate chromosomes collect at opposite ends of cell. Nuclear envelope forms around each of them. Chromosomes unravel (long and thin).

Question 6

Cytokinesis

Answer 6

Cell completely separate and now exist as 2 genetically identical cells

Question 7

What is the difference between mitosis and meiosis?

Answer 7

Mitosis:
2 daughter cells
Diploid cells
All around body 
1 division

Meiosis:
Produces 4 daughter cells,
Haploid cells,
Reproductive organs
2 divisions

Question 8

What is a significant feature of the second division in meiosis?

Answer 8

The same process occurs, but 2 daughter cells are dividing in Prophase II, and DNA does NOT replicate

Question 9

Explain how the events that take place during interphase and mitosis lead to production of two
genetically identical cells.

Answer 9

1. DNA replicated
2. accurate complementary base-pairing
3. two identical sister chromatids
4. Each chromatid moves to poles of cell.