Could exposure to agent orange to a child's dad or grandfather cause learning disorders in future generations?

No: Probably not. It is remotely possible if the father was exposed. But, more than likely, not if the grandfather. "learning disorders" in most, but not all, cases, are hard to define, and are usually not caused by one factor, but by many.

NO!: There has been lots of repeated research that has shown that exposure of fathers9or grandfathers) to agent orange does not result in learning diabilities in children or grandchildren.

Epigenetic factors,: Like the herbicide in agent orange can change the function, but not the structure or sequencing of genes in germ cells (eggs & sperm). The functional differences may be passed to future generations. The veterans' administration position paper on this subject is on http://www.Vva.Org/committees/agentorange/position-paper-birth-defect.Pdf. The mind institute at uc davis has done animal studies, also.