mosaic cleavage

См. также в других словарях:

• mosaic egg — At one time a distinction was drawn between those organisms in which the egg seemed to have a firmly committed fate map built in and regulating embryos. In the former, after the first cleavage one blastomere was committed to produce one set of… …   Dictionary of molecular biology

• spiral cleavage — Pattern of early cleavage found in molluscs and annelids (both mosaic eggs). The animal pole blastomeres are rotated with respect to those of the vegetal pole. The handedness of the spiral twist shows maternal inheritance …   Dictionary of molecular biology

• nucleic acid — /nooh klee ik, klay , nyooh /, Biochem. any of a group of long, linear macromolecules, either DNA or various types of RNA, that carry genetic information directing all cellular functions: composed of linked nucleotides. [1890 95; NUCLE(US) + IC;… …   Universalium

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… …   Universalium

• Hammerhead ribozyme — Taxobox | color=white name = Hammerhead Ribozyme image caption = Stylized rendering of the full length hammerhead ribozyme RNA molecule species = Catalytic RNAHammerhead RNAs are small self cleaving RNAs that have a conserved motif found in… …   Wikipedia

• Preimplantation genetic diagnosis — In medicine and (clinical) genetics preimplantation genetic diagnosis (PGD) (or also known as Embryo Screening) refers to procedures that are performed on embryos prior to implantation, sometimes even on oocytes prior to fertilization. PGD is… …   Wikipedia

• Death Busters — Sailor Moon villain group Left column, top to bottom: Mistress 9, Germatoid, Master Pharaoh 90. Center column: Professor Tomoe, Kaolinite. Right column, in both magical and civilian forms: Mimete, Eudial, Viluy, Tellu. Bottom: Cyprine and Ptilol …   Wikipedia

• protein — proteinaceous /proh tee nay sheuhs, tee i nay /, proteinic, proteinous, adj. /proh teen, tee in/, n. 1. Biochem. any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the… …   Universalium

• Cell fate determination — is the programming of a cell to follow a specified path of cell differentiation. Often, cells are discussed in terms of their terminal differentiation state. During development, fates of some few cells may be specified at certain times. When… …   Wikipedia

• DPVweb — is a database for virologists working on plant viruses combining taxonomic, bioinformatic and symptom data. Contents 1 Description 2 History 3 Uses 4 See also …   Wikipedia