We can't tell what sex your cat is unless you have a picture of it's 'area'! :lol: Well, how old is your kitty? If kitty is pretty old, you can see his "happy-sacks", if not, then it's most likely a girl. Still not sure? Then take your forefingers and put them on the area, and pull apart. If something sticks out, boy. If not, girl.
OR you could go to the doctor and tell him to spay/neuter it, if it's tummy is shaved, its a girl, if not, boy lol!
In the first picture, your cat looks like a female, but you can tell yourself. You know what to look for! She/he can't be registered because she's a mix, but referred to as a domestic short hair-DSH. A long haired cat with mixed heritage would be call DLH, domestic long hair. What's important is that she's a nice pet that you enjoy and love. She's very sweet looking!
att: CATMAN I moved the whole thread, Dan. But, if you think it's worthwhile, you can delete his last post. He's obviously a troll! This was posted about 20 minutes before I saw it, so he didn't have a chance to offend many people.