This sample post has a complete thought but still incomplete.

While there are many parts to a seed, they are essentially an embryo and nutritive tissue wrapped in a seed coat. The classic examples are maize kernels and common bean seeds and most of the tissue in these seeds is derived from the union of embryo sac and sperm cells, thus a mixture of maternal and paternal DNA. I once reviewed a paper in which the authors sequenced grape pips (seeds) from the Roman era to identify the grape variety as compared to extant grape varieties still in cultivation today. I was of course a bit confused as this, to my mind, should not provide the direct genetic identity of the mother grape plant. Upon further investigation regarding the anatomy of grape seeds I learned something interesting about grape seed anatomy. Most of the nutritive tissue of a grape seed, and thus the bulk of the tissue, is maternal tissue and therefore when you sequence the DNA from grape seeds you can learn about the genetics of mother plant that produced them.