Tuberous begonias, which is what you've got there, produce two types of flowers - the larger, showy one is the male flower, and the smaller one is female - the female one has an ovary and if its fertilised will produce seed - but they don't usually produce seed. I'm not sure but they may be sterile, even though separate flowers are still present, Seaburngirl, another member, might know that.

As for asking 'too many' questions, I don't think that's possible! That's why this section of the site exists, to ask about and pass on information, so you needn't feel bothered about it.

Hi they can indeed produce seed but the new plants may be slightly different to the original plant. like our children are different to us.

the triangular pod is forming seed but unless you want to try growing them into new plants I would just cut it off so the plant uses its energy to make other flowers before the frosts.

as bamboo says cant ask too many nor stupid questions on this site.

Thanks for the info. As the begonia is tuberous I think I'll not let it continue with the seed pods.