Are the TMNT biologically related?

[Bravotello]

Originally Posted by Nortock Diab

I believe this could turn into a fascinating storyline and would lead readers to question their conception of family.

It is in the core of TMNT that family goes beyond blood ties, so keeping on exploring this thematic that way would have a great potential.

Imagine the turtles find out that 3 of them are actually blood brothers while the 4th one is not. How would they react?
In my opinion, that is a very interesting starting point that deserves to be developped.

Whoaaaa that is an awesome idea! I'd love to see someone do that.