IB Biology SL D3.1.11 Self Incompatibility Mechanisms Questions
Explain how recognition systems block self-pollen from fertilizing ovules of the same plant in IB Biology SL D3.1.11.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain that self-incompatibility recognition prevents pollen from the same plant fertilizing its ovules, thereby reducing inbreeding.
IB Biology SL D3.1.11 Self Incompatibility Mechanisms Questions question 1
[Maximum number: 1]
Cherry trees (Prunus avium) have two self-incompatibility alleles. What benefit do self-incompatibility alleles have?
A
They decrease genetic variation.
B
They prevent inbreeding.
C
They decrease the chances of mutations taking place within the gametes.
D
They prevent the plant from releasing pollen at certain times of the year.
B
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