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5 cards from this section. Quick, good the night before a test.
Name the three types of pollination based on the source of the pollen.
Ask where the pollen came from: the same flower, the same plant or another plant.
What are cleistogamous flowers?
Think of Viola and Commelina.
The transfer of pollen from the anther of one flower to the stigma of another flower on the same plant is called
The flowers are different, but the plant is the same.
Which type of pollination brings genetically different pollen to the stigma?
The pollen must come from another individual.
A breeder wants to cross a tall pea variety (female parent) with a dwarf pea variety (male parent). Garden pea is normally self-pollinated before its flowers open. Describe the steps the breeder must follow and explain why each is needed.
First stop autogamy, then stop stray pollen, then supply the chosen pollen.
A large tree bears thousands of bisexual flowers and is pollinated by bees, but its seeds show very little genetic variation. Suggest why, and propose two floral features that natural selection could favour to increase cross-pollination.
Think about which type of pollination is likely when a pollinator stays on one tree.
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