This page explains the basic steps.
The objective is to bring together the male and female flowers. This means the transferring of pollen from the anther ( on the male flower ) to the stigma ( on the female flower ) this action is called the pollination.
Once pollination has taken place, the sperm in the pollen grows down the style ( of the female flower ) till it reaches the ovules this action is called the fertilisation . It is the fertilising of the ovules ( eggs) that then produce the seed that become the next generation of begonias.
It is action of mixing the DNA of the sperm in the pollen from the male plant and the DNA of the female ovules ( eggs ) that make each flower unique.
Sexual reproduction in this way produces genetically unique offspring meaning you cannot get two or more identical.
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