[TrebleRebel]

http://polymer.bu.edu/ogaf/html/chp51.htm
The link above shows that the make-up of the growth media plays a key role in controlling the growth pattern on the surface of an agar plate. I doubt that 2 near clones of anthrax spores would produce different growth patterns without also displaying very apparent genetic differences readily seen with DNA analysis.

[Sacajaweau]

So let's think again about the scientist that went over the bridge and was found in a river, miles away not as a perp but as a "brain" in the related scientific fields.