Like other mammals, the female (Queen) has a vagina, gives birth to young and feeds her young milk. The male (Tom) has visible sexual organs, i.e. a penis and testicles. So basically look between the hind legs. Even if it's a neutered male, it will still have a penis.
yes the female cat has a vegina and the male has a penis and testicals... and there r difference in behavural habits...i have got 2 male's and female and there r a lot of difference between the male and female..