IB Biology SL D3.1.11 Self Incompatibility Mechanisms Topic Practice

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Study D3.1.11—Self-incompatibility mechanisms conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

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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.

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