7
Question
Discuss about self-pollination and cross-pollination.
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Solution
Self pollination
- It is the transfer
of pollen grains from another to stigma of same or similar flower.
- Pollen grains are
produced in small number.
- An external agency
is not required.
- It does not produce
variation.
- There is a slow loss
of vigor in self pollinated plants.
Cross pollination
- It is the transfer
of pollen grains from the anther of one flower to the stigma of
another flower.
- Pollen grains are
produced in large number.
- An external agency
is required for carrying pollen grains form one flower to another.
- It brings about a
lot of variations.
- Vigor of the plants
is maintained.
- It is the transfer of pollen grains from another to stigma of same or similar flower.
- Pollen grains are produced in small number.
- An external agency is not required.
- It does not produce variation.
- There is a slow loss of vigor in self pollinated plants.
Cross pollination
- It is the transfer of pollen grains from the anther of one flower to the stigma of another flower.
- Pollen grains are produced in large number.
- An external agency is required for carrying pollen grains form one flower to another.
- It brings about a lot of variations.
- Vigor of the plants is maintained.
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