difference between self pollination and cross pollination class 10
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Differentiate between self pollination and cross pollination.
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Differentiate between self pollination and cross pollination.
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SELF-POLLINATION CROSS-POLLINATION
1) The process of transferring the pollen grains from the anther to the stigma of the same flower or the stigma of a flower on the same plant is called self-pollination.
2) It occurs in genetically same plants.
3) No external pollinating agents are required.
4) Eg- Orchids. 1) The process by which the pollen grains are transferred from the anther of a flower to the stigma of another flower of the same species is called cross-pollination.
2) It occurs in genetically different plants of the same species.
3) External pollinating agents are required for this type of pollination (water, wind, insects etc).
4) Eg- Papaya.
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Pollination, its Types and Comparisons between Self and Cross Pollination
The process of transferring the pollen grains from a male part of a plant to a female part of a plant is termed as Pollination.There are two types of Pollination.
BiologyBiology ArticleDifference Between Cross Pollination And Self Pollination
Difference Between Self Pollination and Cross Pollination
In plants, pollination plays an important role in reproduction.
Pollination is the sexual method of reproducing in all plants by the process of transferring the pollen grains from the anther to the stigma of the gynoecium and thereby permitting the fertilization process. In this process, the spermatophytes or the seed plants pass their genetic information to its next-generation, just like all other living organisms.
Christian Konrad Sprengel first identified the process of pollination in the 18th century. This is commonly known as an interaction between pollen vector and a flower. The significance is found in agriculture and horticulture.
There are two types of pollination -:
Self-pollination
Cross-pollination
Cross-Pollination
Cross-pollination is defined as the deposition of pollen grains from a flower to the stigma of another flower. Commonly, the process is done by insects and wind. By insects, the process takes place in several plants like strawberries, grapes, raspberries, tulips, apples, plums, pears, daffodils, and more. Pollination by the wind is observed in different grasses, maple trees, dandelions and catkins.
Self Pollination
In this process, the pollen grains transfer from the stigma of the same or genetically similar flower. Self-pollination can be observed in legumes such as orchids, sunflowers, peas, peanuts, oats, peaches, potatoes, wheat, and others.
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Let us learn more in detail about the differences between the two types of pollination.
Difference Between Self-Pollination and Cross-Pollination
Self-Pollination Cross-PollinationTransfer pollen grains from the anther to the stigma of the same flower. Transfer pollen grains from the anther to the stigma of a different flower.
This process can take place in the same flower or a different flower of the same plant. This process can take place between two flowers present on different plants.
It occurs in the flowers which are genetically identical. It occurs between flowers which are genetically different.
Few species that exhibit self-pollination – Paphiopedilum parishii, Arabidopsis thaliana Few species that exhibit cross-pollination – apples, daffodils, pumpkins and grasses
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 simultaneously mature In cross-pollination, both the stigma and anther mature at different times.
Transfers a limited number of pollens. Transfers large numbers of pollen.
This process is carried out even when the flowers are closed. For cross-pollination to happen, the flower should be open.
No need for pollinators to transfer pollen grains. Require pollinators to transfer pollen grains.
Pollen grains are transferred directly to a flower’s stigma. Pollen grains are carried via wind, insects, animals, water, etc.
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Q6 Expalin the difference between selfpollination and crosspollination...
Free solutions for NCERT Solutions - Science , Class 7 Chapter 13 - Reproduction in Plants Exercise question 18. These explanations are written by Lido teacher so that you easily understand even the most difficult concepts
NCERT Solutions Class 7 Science Solutions for Exercise in Chapter 12 - Reproduction in Plants
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Q6) Expalin the difference between self-pollination and cross-pollination.
Answer: Solution:
BASIS OF DIFFERENTIATION SELF POLLINATION CROSS POLLINATION
Meaning The process of transfer of pollen grains from anthers to the stigma of a flower, but when this process is between the flowers of the same plant than the term is called self-pollination. The process of transfer of pollen grains between the flowers of the different plants of the same species is called cross-pollination.
It involves Single plant Two different plants of the same species.
Self pollination Self-pollination occurs in perfect flowers only. It occurs in both imperfect and perfect flowers.
Pollinating agents Pollinating agents are not required. Pollinating agent such as wind, water, insects, etc. is not required
Pollen grains Less number of pollen grains are produced. A large number of pollen grains are produced.
Examples Wheat, rice, pea, orchids, barley, tomatoes, peaches, apricot. Mulberry, maize, pumpkins, strawberries, blackberries, plums, grapes, daffodils, maple, catkins, grasses.
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