CAIE A-Level Biology A2 16.1.5 Meiosis I and Ii Stages Questions
Explain the stages of meiosis I and II using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Exam points
- Explain the stages of meiosis I and II.
CAIE A-Level Biology A2 16.1.5 Meiosis I and Ii Stages Questions question 1
[Maximum number: 4]
Within a population, the variation for one characteristic is usually the result of genetic and environmental causes.
Meiosis is one source of genetic variation.
Describe the events that take place during prophase I of meiosis in an animal cell.
any 4 of:
1 chromosomes become visible ;
2 condensation / coiling / supercoiling ;
A description
3 nuclear envelope or nuclear membrane, disintegrates / disappears ;
4 nucleolus, disintegrates / disappears ;
5 centrioles migrate to (opposite) poles ;
I centrosomes
6 spindle forms / microtubules assemble ;
7 synapsis / bivalents form / homologous chromosomes pair up ;
8 chiasmata formation / crossing over ;
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