Question

6differences between self pollination and crosspollination

Answer 1

Answer:

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.

Answer 2

$\huge\underline\blue{\sf Self\: Pollination:}$

• Transfer of pollen grain from anther to stigma to same flower.

• Self Pollination involves in single plant .

• It occurs only in bisexual flowers.

• Such type of pollination don't need any pollinating agent .

• It doesn't leads to genetic diversity.

• Cause inbreeding.

• No varieties develop.

$\huge\underline\blue{\sf Cross\: Pollination:}$

• Transfer of pollen grain from anther to stigma of different flower.

• Cross Pollination involves in two different plant to same species.

• It takes place in both bisexual and unisexual flowers.

• This type of pollination need pollinating agent.

• It leads to genetic diversity.

• Cause Out-breeding .

• Possibilities of origin of new varieties.