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.
If comparisons of the mouse and human genomes allow for detecting such examples of âgene birth,â they also allow for detecting cases of âgene death.â On human chromosome 4, for example, the gene encoding Interleukin 8 (IL8) has no ortholog in the homologous segment of mouse Chr 5 (Fig. 1).