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Development and Life 2045
Activation of Sea Urchin 4661
Conclusions and Future Investigations 6267
activate the eggs activating agents amino acid ammonia artificial parthenogenesis artificially activated eggs batches of eggs Biol Brachet cell division Cell Res chromosome cleavage stages concentration cortical granules cortical reaction cytoplasm diploid DNA synthesis egg activation eggs exposed eggs of Lytechinus eggs suspended embryos Entw exposure female fertilization membrane fertilized controls fertilized eggs Feulgen Feulgen stained filtered sea water fragments of sea gastrulation genes hand centrifuged haploid haploid syndrome Hertwig Hinegardner homozygous hypertonic sea water initiated ionophore ionophore activated larvae Ledebur-Villiger Loeb Lytechinus pictus eggs Mazia mitotic mouse normal sea water nuclear nuclei parthenogenetic larvae parthenogenetic urchins Physiol Pincus plasma membrane ploidy plutei polar body polyspermy producing pronase protease protein synthesis proteolytic enzymes purpuratus resuspended Schuel sea urchin eggs second polar body sperm Steinhardt and Epel supernatant swimming blastulae thymidine thymidine incorporation trypsin Tyler unfertilized sea urchin uptake Vacquier vitelline layer vivo Zool