I asked a question related to the third sex, and I came to know that its always possible to categorize a human to male or female with presence of Y chromosome.
Now, I have another question. Is there a way to say if someone has Y chromosome only with external physical test? More specifically:
- Someone has a penis, can we say that s/he will have Y chromosome?
- Some one has Y chromosome, can we say that he will have a penis?