meiosis prophase 1 and metaphase 1 Flashcards
1
Q
DNA condenses and becomes
A
visible as chromosomes
2
Q
DNA replication has already occurred so each chromosome consists of ………… joined by ………
A
two sister chromatids joined together by a centromere
3
Q
The chromosomes are arranged side by side in
A
homologous pairs
4
Q
What is a individual pair of homologous pairs called
A
bivalent
5
Q
As the homologous chromosomes are very close together the crossing over of
The point at which the crossing over occurs is called the
A
non-sister chromatids may occur
chiasma
6
Q
In this stage centrioles migrate to………… and what … fibre is formed
A
7
Q
The nuclear envelope ………… and the nucleolus ………….
A
breaks down
disintegrates
8
Q
What happens in metaphase
A
The bivalents line up along the equator of the spindle, with the spindle fibres attached to the centromeres
