Source(s): immigration nationality directorate border immigration uk border agency reference no: https://tinyurl.im/UEZro.
About 99% of mouse genes have a homolog in the human genome, and for 80% of these genes, the best match in the human genome has, in turn, its best match against the orthologous mouse gene in the conserved syntenic interval.
Mice are usually brown or light grey in color but different species can be lighter or darker. They have pointed noses, small round ears, and long hairless tails. Most mice range from 3-4 inches in length, but some can grow to be bigger depending on the species.