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.
01.10.2006 - Rats and mice are similar in appearance. In fact, people often confuse juvenile rats for mice, and the two do look extremely similar. While there are several species of rats and mice, I will examine the two most common ones, the Roof or Black Rat, and the House Mouse, both seen in the above photograph. As you can see, the biggest difference is size. Rats grow to a body of 8 inches and a tail of 9 inches, and a weight of almost a pound.