Subject: How come there are seedless fruits?

If I remember my high school biology correctly a flower must be fertilized by a 
pollen grain in order for it to have a fertilize egg (or seed).   When 
fertilization tooks place, the petals begins to wither and the ovary starts to 
grow as the fertilized egg developed into a seed.   The grown ovary is what we 
call a fruit in layman's term and it has SEEDS INSIDE.

How is it then possible to have a seedless fruit?
Is the process involved in developing seedless grapes found in your website 
applicable to citrus fruits and other fruits or is it a different process?

Re: How come there are seedless fruits?