Slideshow: Mendel upended?

For the February issue, Andrea Gawrylewski traveled to the University of Waterloo, Ontario, to check in on Arabidopsis researcher Susan Lolle's ongoing experiments. Lolle and colleagues reported in 2005 that a mutant Arabidopsis plant could revert to the genotype of its grandparents, countering one of the main principles of Mendel's laws of inheritance. Her current experiments expand on the 2005 work by really targeting to what extent outcrossing may account for the number of "revertants."