[Stultis]

This experiment provides the first evidence in higher organisms that environmental conditions, applied at a specific stage of development cause a heritable change in a specific allele expression. (emphasis mine)

Not bad (if this bears out) but like your other examples this doesn't increase the quantity of underlying variation available for expression in the genome. It only effects how a particular gene is expressed. The genes and their alleles (variants) remain the same.

[johnnyb_61820]

"but like your other examples this doesn't increase the quantity of underlying variation available for expression in the genome."

Actually, my other examples did in fact increase the underlying variation available. You should read Shapiro's and Sternbergs work on transposons, genome architecture, and natural genetic engineering.