The B locus in dogs controls whether the dog is liver. Liver is recessive (b), so a dog needs two copies of the allele in order to be liver. If a dog is bb on the B locus then any and all black in its coat will become a brownish colour. Bb and BB have no effect.
Micro: Mini, small, tiny. Micro is also a term used in the RTS Starcraft, as a term for modified unit control. Micro can also refer to the descriptions of micro-organisms. Micro as a unit of measurement is defined as: One millionth..
Wavelengths of optical light have units of nanometers (nm). One nm is equal to one billionth of a meter. Micro (abbreviated by the Greek letter mu or Âµ) is one millionth or 10-6. A micrometer, or one thousandth of a meter is sometimes called a micron. Milli (m) is one thousandth or 10-3.