[!word="several-day-old"] [lemma=embryo] [tag=□]
[!word="several-day-old"] [lemma=embryo] [tag=","]
We have recently determined that Vera / ZBP has an interesting localization pattern in fly embryos , consistent with a role in localizing the well-known maternal RNAs that play commanding roles in the establishment of this organism 's body plan . The workshop had a strong practical emphasis , and particular care was taken to design experimental activities which could be easily transferable to the classroom : pollen viability testing and germination , observation of normal and mutant adult flies and fly embryos , observation of various chick embryos developmental stages . Interestingly in the mutant embryo , a file of coleoptilar cells occupied an ectopic position , invading the central region of the shoot apex , which is normally occupied by the leaf primordia . Nowadays three embryos , and in U.S. fertility clinics often many more , are introduced into the uterus in order to increase the chances that one will implant . Every experiment using embryonic stem cells - - and every argument about their morality - - ultimately begins with one of these embryos , about the size of the dot of an " i , " conceived for a couple trying to build a family . PGD involves the removal of one or two cells from eggs fertilized via in vitro fertilization , the genetic testing of these embryos , and the destruction of the ones possessing " undesirable " characteristics . In this presentation I will explore models of the gene regulatory network governing the segmentation of fruit fly embryos , and of the signal transduction network regulating drought response in plants . In the mutant embryo , cells are piled up in the primitive streak ( right side ) . As a Catholic moralist , I need the proponents of ANT to provide me with a body of scientific data which can constitute a basis of information sufficient for me to arrive at moral certainty that the entity created by ANT would not be a severely disabled embryo , indeed , would not be an embryo at all , nor could have the potential to become an embryo .