Plants defy Mendel's inheritance laws

According to this news release, “some plants revert to normal traits carried by their grandparents, bypassing genetic abnormalities carried by both parents”.

Link: news.uns.purdue.edu/UNS/html4ever/2005/050323.Pruitt.inheritance.html

All I can say about this is that there are also plenty of people who are skeptical. We recently had a prominent geneticist, Nancy Wessler, give a talk. She is suspicious that there are some silent copies of the genes located in teh centromere region of the chromosomes where the Arabidopsis mapping project hasn’t finished yet. On the other hand there are plenty of new things in plant genetics that you could imagine allowing some RNA to be carried along through the next generation, especially if there is a strong selective pressure like a gene that is needed for survival. Not likely to matter in things like rose flower color unfortunately.