Question

difference between self pollination and cross pollination ​

Answer 1

$\huge \red{ \underline{{ { \textbf{ANSWER}}}}}$

➡ Self-Pollination

• Transfer pollen grains from the anther to the stigma of the same flower.

• This process can take place either in the same flower or another flower of the same plant.

• It occurs in the flowers which are genetically same.

• Occurs only in perfect flowers.

• Causes homogenous conditions in progenies.

• Self-pollination increases genetic uniformity and decreases genetic variation.

• Causes inbreeding.

• Reduces the gene pool.

• Produces limited amounts of pollen grains.

• In self-pollination, both the stigma and anther mature at the same time.

• Transfers few numbers of pollen.

• This process is carried out even when the flowers are closed.

• No need of pollinators to transfer pollen grains.

• Pollen grains are directly transferred onto the stigma of the flower.

➡ Cross-Pollination

• Transfer pollen grains from the anther to the stigma of the different flower.

• This process can take place between two flowers on different plants.

• It occurs between flowers which are genetically different.

• Occurs both in perfect or imperfect flowers.

• Causes heterozygous condition in progenies.

• Cross-pollination decreases genetic uniformity and increases genetic variation.

• Causes outbreeding.

• Maintains the gene pool.

• Produces large amounts of pollen grains.

• In cross-pollination, both the stigma and anther mature at the different time.

• Transfers large numbers of pollen.

• For cross-pollination to happens flower should be open.

• Require pollinators to transfer pollen grains.

• Pollen grains are transferred through insects, wind, water, animals, etc.

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Answer 2

Answer:

Self-pollination occurs when the pollen grain 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 grain from the anther of one flower to the stigma of another flower of the same species.

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