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..
The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: Î¼m) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling 1 Ã 10 â6 metre (SI standard prefix micro- = 10 â6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).