Biotechnology and Genetics terms starting with Z

15 terms

  1. Z-DNA A region of DNA that is "flipped" into a lefthanded helix, characterized by alternating purines and pyrimidines, and which may be the target of a…
  2. zig-zag DNA See: Z-DNA.
  3. zinc finger A DNA-binding protein motif, characterized by two closely spaced cysteine and two histidine residues that serve as ligands for a single Zn2+ ion.
  4. Zinc-finger protein A secondary feature of some proteins containing a zinc atom; a DNA-binding protein.
  5. Zona pellucida A thick, transparent noncellular layer that surrounds and protects the oocyte.
  6. zone of elongation The section of the young root or shoot just behind the apical meristem, in which the cells are enlarging and elongating rapidly.
  7. zoo blot Hybridization of cloned DNA from one species to DNA from a range of other organisms to determine the extent to which the cloned DNA is evolutionarily…
  8. zoo FISH Fluorescence in situ hybridization technique, probing metaphase chromosome s of one species with DNA from another species.
  9. Zoonosis A disease that naturally occurs in animals that can also occur in humans.
  10. zoospore A spore that possesses flagella and is therefore motile.
  11. zygonema Stage of meiotic prophase during which chromosome synapsis occurs.
  12. zygospore A thick-walled resistant spore developing from a zygote resulting from the fusion of gamete s in the course of isogamy.
  13. Zygote The diploid cell formed by the fusion of two haploid gamete s during fertilization in eukaryotic organisms with sexual reproduction.
  14. zygotene (adj.) See: zygonema.
  15. zymogen Inactive enzyme precursor that after secretion is chemically altered to the active form of the enzyme.