The modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.
Polar covalent bonds hold the actual hydrogen and oxygen atoms within the molecule of water but if you meant what holds water together as a liquid then that is called hydrogenâ¦ bonding between molecules, a type of dipole interaction.
What type of chemical bond is there in water?   The two hydrogen molecules and the oxygen molecule in water are joined by covalent bonding where they share the electron.hat type of chemical bond is there in water?   The two hydrogen molecules and the oxygen molecule in water are joined by covalent bonding where they share the electron.