Question

Difference between self pollination and cross pollination



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Answer 1

$\underline{\textbf{QUESTION :-}}$

Difference between self pollination and cross pollination

$\underline{\textbf{ANSWER :-}}$

Self-pollination occurs between male and female flowers of the same plant whereas Cross-pollination occurs between male and female flowers of two plants of same species.

• Self-pollination occurs in the Monoecious plants, whereas For Cross-pollination is not necessary for plants to be monoecious, because self-pollination generally takes place in Dioecious plants.

• Because Self-pollination takes place between the male and female flowers of the same plant, it is not necessary to have a beautiful, large and Crispy flowers, whereas for the self-pollination it is very necessary to have beautiful, large and Crispy flowers. The reason behind this is very simple, Cross-pollination takes place in between two plants which require an agent to drop pollen grains to the female sex organ of another plant. so if the flower will not have these specialities, Agents like birds and insects will not be attracted towards flowers and pollination will not be done.

• Fewer pollen grains are required for self-pollination. Because pollination is not wasted in this types of pollination, whereas a large number of pollen grains are required for cross-pollination, because pollen grains are destroyed in very large quantities in the case of cross-pollination.

• After self-pollination, the seeds are less in number, weight and smaller in size, while the seeds formed from cross-pollination are heavier in weight and are much larger in size.

• If the process of self-pollination continues over generations, the plants start getting sick and weak, but if the cross-pollination continues for generations, the plants become strong and healthy.

• Plants formed after self-pollination have fewer chances of being optimized according to the environment, while plants are optimized according to the environment after cross-pollination.

• There is no possibility of development of different characters in self-pollination because plants have the same genetic properties, whereas, on the mixing of genetic traits of two plants in cross-pollination, there are more possibilities of development of variations and differences.

• The purity of characters remains in plants formed after self-pollination, but after cross-pollination, there is no purity of traits over the period of generations.

• There is no need of any agent like insect, bird, animal etc for self-pollination because it occurs between two male and female flowers of the same plant, whereas in the cross-pollination there is the need of these agents because cross-pollination occurs between male and female flowers of different plants of the same species.

• Birds and insects have no role in self-pollination, whereas they have a lot of role in cross-pollination.

• Examples

1. Examples of Self Pollination – Wheat, Peas, Paddy, Potato, Sunflower, Peanuts
2. Examples of Self-pollination – Grapes, Apples, Orchids, Papaya, Mulberry, Fig, Corn, banyan, peepal, basil, coriander, pine, Vallisneria, hydrilla, acacia, salvia.

Answer 2

Explanation:

Self pollintaion= The pollination that happens within the plant is known as self pollination.

OR

Self pollination involves tge same plant only. When tge pollen grains are transferred from anther to the stigma of the same flower, or another flower of tge sane plant is known as self pollination

Cross pollination=The process by which tge pollen grains are transffered From the anther of a flower to the stigma of tge another flower of tge same type is known as cross pollination

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