n: number of different types of chromosomes in a certain species, n=23 for humans. We have chromosomes in pairs (except in gametes)
Slide 4 - Diapositive
The G1, S and G2 phase together make up the:
A
Cell cycle
B
Interphase
C
Mitosis
D
Growth phase
Slide 5 - Quiz
In which phase of the cell cycle are organelles formed?
A
M phase
B
G1 Phase
C
G2 Phase
D
S phase
Slide 6 - Quiz
What is the name of the structure which connects the chromatids?
A
Centriole
B
Centromere
C
Controsome
Slide 7 - Quiz
Which applies?
A
4 chromosomes, 8 chromatids
B
8 chromosomes, 8 chromatids
C
8 chromosomes, 4 chromatids
D
8 chromosomes, 16 chromatids
Slide 8 - Quiz
Which applies?
A
4 chromosomes, 8 chromatids
B
8 chromosomes, 8 chromatids
C
8 chromosomes, 4 chromatids
D
8 chromosomes, 16 chromatids
Slide 9 - Quiz
M-phase
Cell division
Two options: - Mitosis: creating exact copies of the original cell (growth and repair) - Meiosis: creating cells with half the number of chromosomes for reproduction (the gametes)
Slide 10 - Diapositive
Mitosis
One cell will split in two exact copies
2n (46) --> 2n + 2n
Slide 11 - Diapositive
Prophase
Chromosomes coil and condense (each has two chromatids)
Nuclear membrane starts breaking down
Spindle apparatus appears
Slide 12 - Diapositive
Metaphase
Centromeres lined up on the equator
Each chromatid attached to a spindle fibre
Slide 13 - Diapositive
Anaphase
Separation of the sister chromatids
Sister chromatids move to opposite poles, now called chromosomes