MB>I'm not sure how they do it. But I've grown some that are
MB>considered "seedless". They do warn you to isolate them from
MB>other cucumber varieties or they will develop seeds.
  They are hybrids, Marilyn. By years of genetic manipulation,
  scientists have (usually) doubled the number of chromosomes for
  certain traits, and found that crossing them with certain other
  strains produced seedless fruits. Most seeds are the product of the
  mother fruit, and if the mother remains seedless, that is what you
  buy. But isolation is a must, or cross-pollination with wild
  (unapproved) strains will result in seed coat formation, with loss of
  seedlessness.
MB>they get seeds for the seedless cucumbers.  They are called
MB>"parthenocarpic" and are self fertile. They don't need any cross
MB>pollination or bee's. So they'll set fruit when the wx is bad and
MB>bees wouldn't be out. They have all female flowers.
  I like them because they set fruit at every node, and none of the
  plant's energy is wasted on unproductive male flowers. Of course, that
  also means I distrust the food values and mineral levels of their
  fruit! :-(
                        ...Sandra...
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