What are the possible types of pollinations in chasmogamous flowers ? Give reasons.

Explanation

Chasmogamy : The pollination that, occurs in opened flowers is calied chasmogamy. It is the most common type of pollination in all types of flowers. There are two types of chasmagamy.
1) Self pollination
2) Cross pollination.
1) Self Pollination : The transfer of pallengrians from Anther to stigma of the same flower is called autogamy or self-pollination, It is found in both cleistogamous and chasmogamous flowers.
2) Cross pollination Or allogamy : The transfer of pollengrains from Anther to stigma of another flower is called cross pollination. It is of 2 types: a) Geitonogamy b) Xenogamy.
a) Geitonogamy : The transfer of pollengrains-from anther to the stigma of another flower of the same plant. lt is functionally Gross pollination involving a pollinating agent, genetically. it is similar to autogamy. Since the pollengrains come from the same plant.
b) Xenogamy : The transfer of pollengrains from the flower of oneplant to the stigma of another plant. This is the only type of pollination which brings genetically different types of pollengrains to the stigma.