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Difference b/w self pollination or back …

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Difference b/w self pollination or back cross

Posted by Chitranshi Marmat 6 years, 2 months ago

CBSE > Class 12 > Biology

1 answers

Yogita Ingle 6 years, 2 months ago

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.

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