I believe that there are only two genders/sex but for people that don’t agree with me they say gender and sex is different. I wouldn’t like to know how do I can be informed.
By this point in time gender has taken on socialized meaning of being separate from sex. Biologically, yes, you’re right. There are only 2 sexes. However, what most people refer to as gender is different from biological sex. If you view transgenders as presenting a different gender than their biological sex, which at this point is hard to argue, then a biologist might argue that a trans-woman (bio male) presents a separate gender than the traditional male or female. Gender has become something non-binary even if tradition contradicts this. Personally, a better question than “are there more than 2 genders” is asking “is gender meaningful in a post-gender-binary society”.