male plant seeds

Quick question about a male plant producing seeds.Is it worth finishing him just for the seeds, or will the seeds most likely all turn out to be male?The seeds are 'BLACKBERRY' and would like to grow them again.(They weren't 100% fem seeds when i purchased them).
Any thoughts?

A male plant doesn't produce seeds, a pollinated female does. If you only have one plant I would guess that it went hermie and pollinated itself. Seeds from a self pollinated female are called feminized and people claim they have a higher chance of producing females, but they also carry the hermie gene.

That's right, i thought so but wasn't sure.Thanks.