in monohybrid cross between a pure breed plant that produces blue flowers (BB)and a pure breed plant that produces white flowers.The f1 generation produces only blue flowers. By means of a labelled cross diagram,state the type of flower you will expect if the f1 generation is self pollinated

Monohybrid cross between blue and white: BB x bb
The cross produces 100% Bb --> blue is dominant, so all the flowers will be blue. This is the F1 generation.
If F1 is self-pollinated, it will be Bb x Bb.
The cross will produce 25% BB, 50% Bb, and 25% bb.
Since blue is dominant, 75% of the flowers will be blue, while 25% will be white.

Pictures:

The first picture is the BB x bb cross.
The second picture is the Bb x Bb cross.
I don't know why the pictures are appearing sideways. If you click the rotate button at the top right of the pictures, you can turn them.

in monohybrid cross between a pure breed plant that produces blue flowers (BB)and a pure breed plant that produces white flowers.The f1 generation produces only blue flowers. By means of a labelled cross diagram,state the type of flower you will expect if the f1 generation is self pollinated​