In meiotic chromosomal interactions, the danger is that negative interactions may be passed on to future generations. The mutations result in a variety of well-known conditions. The future may hold more or fewer, and it is anybody's guess.
A. Epistasis
B. Multiple alleles... etc.

What does the bold sentence mean in this context? I have found the meaning of one part of a sentence only: https://www.google.com.ua/search?client=opera&hs=pEi&q=it+is+anybody%27s+guess&oq=it+is+anybody%27s+guess&gs_l=psy-ab.3..0i22i30k1l4.16718.16718.0.17851.1.1.0.0.0.0.98.98.1.1.0....0...1.1.64.psy-ab..0.1.96.gEzotNrmox4
Does it mean that diseases that are passed on may be more or less serious and it is difficult to determine whether they will be inherited or not?