difference between self pollination and cross pollination
Answers
Answer:
Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.
Explanation:
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Answer:
Self-Pollination Cross-Pollination
Transfer pollen grains from the anther to the stigma of the same flower. Transfer pollen grains from the anther to the stigma of the different flower.
This process can take place either in the same flower or another flower of the same plant. This process can take place between two flowers on different plants.
It occurs in the flowers which are genetically same. It occurs between flowers which are genetically different.
Occurs only in perfect flowers. Occurs both in perfect or imperfect flowers.
Causes homogenous conditions in progenies. Causes heterozygous condition in progenies.
Self-pollination increases genetic uniformity and decreases genetic variation. Cross-pollination decreases genetic uniformity and increases genetic variation.
Causes inbreeding. Causes outbreeding.
Reduces the gene pool. Maintains the gene pool.
Produces limited amounts of pollen grains. Produces large amounts of pollen grains.
In self-pollination, both the stigma and anther mature at the same time. In cross-pollination, both the stigma and anther mature at the different time.
Transfers few numbers of pollen. Transfers large numbers of pollen.
This process is carried out even when the flowers are closed. For cross-pollination to happens flower should be open.
No need of pollinators to transfer pollen grains. Require pollinators to transfer pollen grains.
Pollen grains are directly transferred onto the stigma of the flower. Pollen grains are transferred through insects, wind, water, animals, etc.
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