Meiosis Flashcards
1
Q
Meiosis in simple terms
A
Only occurs in gametes (sex cells). Used for sexual reproduction.
2
Q
Prophase 1 - prepare
A
Coil-copy-crossing over of pairs
Chromosomes exchange bits.
3
Q
Metaphase 1 - middle
A
Pairs line up down the middle (23 pairs)
4
Q
Anaphase 1 - away
A
Spindle fibres attach to a whole chromosome, and pull a whole chromosome to either end.
5
Q
Telophase 1 - two
A
The nuclear envelope pinches in and becomes two - then PAUSES
6
Q
Prophase 2
A
Not much happens, chromosomes line up again.
Still copied in the X-shape.
7
Q
Metaphase 2
A
Copied but mixed up chromosomes line up in the middle in ONE line of 23 chromosomes.
8
Q
Anaphase 2
A
Spindle fibres attach to random chromatids and pull chromosomes apart.
9
Q
Telophase 2
A
Nuclear envelope pinches in and becomes two.
CYTOKINESIS NOW BEGINS
