Meiosis Flashcards
1
Q
What happens in prophase 1?
A
- Homologous chromosomes pair up
- Crossing over leads to genetic variation
2
Q
What happens in metaphase 1?
A
- Homologous pairs line up along the centre, metaphase plate
- Independent assortment of homologous assortment leads to genetic variation
3
Q
What is independent assortment?
A
The orientation of each homologous pair is random and independent, so different combinations of alleles can end up facing the poles
4
Q
What happens in anaphase 1?
A
- Separation homologous chromosomes
- No separation of centromere
5
Q
What happens in telophase 1?
A
- Chromosomes assemble at each pole and the nuclear membrane reforms
6
Q
How is it easier to revise meiosis 2?
A
It is the same at mitosis
7
Q
What happens in prophase 2?
A
- Chromosomes condense and become visible
- Nuclear envelope breaks down and spindle formation begins
8
Q
How is metaphase 2 different from metaphase 1?
A
Individul chromosomes line up along the metaphase plate, instead of the homologous pairs
9
Q
What occurs after mitosis and meiosis to divide the whole cells?
A
Cytokinesis
