Blending Yeast Strains

TroubleShooting

Tor Mckee • Hanford, California asks,

I am going to be making my first wheat beer and was thinking to try and step culture yeast from a bottle of really good hefeweizen. However, just in case I don’t culture up enough I am also going to use an American hefeweizen yeast strain.  I know that mixing yeast is OK to do, but what will happen exactly?  Will the yeast just share the sugars or will they blend to form a different strain of yeast all together?