What is the biblical basis for considering gender to be purely physical/biological? In my other question, I asked what the biblical basis was for considering gender to not be merely physical, but also present in a person's soul and/or spirit.  However, there are some who believe that gender is purely physical, so it seems necessary to ask that question as well.  

So, what is the biblical basis/argument/rationale that supports the idea that gender is something that is only physical/biological and does not have any presence in a person's soul or spirit?
The only "evidence" I have seen for this is the time when the Pharisees are attempting to trap Jesus by asking who would be the husband in heaven of a woman widowed seven times. His answer is none; we will be like the angels in heaven.

Some people think that this automatically means that there will be no sex or procreation and also no gender.

A few issues:  


Jesus only said there will be no marriage in the Kingdom of Heaven; nothing to do with sex or gender.  
Assuming He included sex and procreation, too, in that statement, does not mean that we will be without gender, although gender would seem unnecessary.  
Like the angels seems to me that we should examine angels and their lives for an answer on this issue. Frankly, there is very little on angels in the Bible, but quite a bit in the Apocrypha.


So, with that I would say only this, assuredly: The angels do not marry and neither will we after our resurrection into the Kingdom of heaven.

If there is more support for this viewpoint, I am unaware of it.