Exam 4 - Mitosis & Meiosis

Question 1

interphase includes:

Answer 1

Gap 1 (G1)
[G0 - cells stay here if are specific. e.g. nerve, muscle)]
S phase (synthesis)
Gap 2 (G2)

Question 2

Gap 1

Answer 2

rapid growth & metabolic activity

Question 3

MPF

Answer 3

maturation promotion factor - promotes DNA synthesis and mitosis
- is a combination of CDK (cyclin dependent kinase) and cyclin

Question 4

cyclin

Answer 4

2 kinds

1. S-MPF
2. M-MPF

Question 5

S - MPF

Answer 5

synthesis maturation promotion factor

• initiates DNA replication in S phase
• concentration is highest at end of G1, right before S

Question 6

M - MPF

Answer 6

mitosis maturation promotion factor

• initiates mitosis in M phase
• concentration is highest at end of G2, right before M

Question 7

meiosis

Answer 7

DNA replicates once; cells divide twice

aka reduction division

Question 8

ploidy level

Answer 8

indicates how many sets of chromosomes (N) are present in a cell
haploid (1N) - single set (sperm, egg cell)
diploid (2N) - 2 sets (body cell)
tetraploid (4N) - 4 sets (plants)
polyploid (many N) - several sets (sugarcane)

Question 9

homologous

Answer 9

in each pair of chromosomes - one is maternal, one is paternal
- they are homologous

Question 10

cdk

Answer 10

cyclin dependent kinase -