breeding shrimp

Hey everyone this is my first post on tropical fish keeping! :-D can anyone help me determine the sex of my red cherry shrimp? I plan on breeding them but i have a fear all 5 of mine are females.... here is a picture of 3, the other 2 are hiding :-( Anyways if anyone can tell me the gender of...

I just recently set up a 10 gallon with a (male) betta, two african dwarf frogs, some ghosties and a couple of snails. I'd like to throw about 10-15 cherry shrimp in that tank to start breeding. It's not heavily decorated yet (still making design choices) but I've got a 4x8 patch of (fake) grass...