Lesson 2 - Cell Cycle

Question 1

why do cells reproduce

Answer 1

-repair
-growth
-reproduce

Question 2

sexual reproduction vs asexual reproduction

Answer 2

sexual: union of 2 sex cells, one from each parent, genetic offspring is different from each parent

asexual: offspring from a single parent, offspring is identical to parent

Question 3

three stages of interphase

Answer 3

G1 - cell grows and carries out normal functions
S - dna is replicated
G2 - cell continues to grow and prepare for divison

Question 4

four phases of mitosis

Answer 4

1. prophase - chromosomes condenses and become visible, centrioles move to opposite poles, spindle fibres form and are attached to centromes of the chromosome, the nuclear membrane starts to dissolve
2. metaphase - chromosomes line up in the middle of the cell
3. anaphase - spindle fibres pull the chromatids apart and move the identical chromosomes to opposite poles of the cell
4. telophase - chromosomes uncoil, spindle fibres dissolve, nuclear membrane forms around chromosomes

Question 5

process of cytokinesis

Answer 5

cytoplasm divides making two physically separate cells

animals - cytoplasm pinches in
plants - cell plate forms which becomes the cell wall