Table 1.

The number of genes and proteins in the human, mouse, and rat genomes^a

Chr.	Human			Mouse			Rat
	Protein	gene	Pseudogene	Protein	Gene	Pseudogene	Protein	Gene	Pseudogene
1	11,321	5,109	1,386	4,731	2,687	579	7,447	4,981	937
2	8,291	3,871	1,181	6,282	3,491	609	3,463	2,725	630
3	7,150	2,990	900	3,507	2,225	480	4,337	2,969	510
4	4,599	2,441	803	4,710	2,622	497	3,375	2,383	442
5	4,729	2,592	778	4,634	2,507	413	3,481	2,194	411
6	5,522	3,005	882	3,844	2,597	555	2,193	1,839	355
7	5,112	2,792	911	6,336	3,798	935	3,399	2,319	474
8	4,199	2,165	671	3,653	2,177	376	3,213	2,087	348
9	4,699	2,270	706	4,406	2,276	374	2,502	1,442	261
10	5,429	2,179	640	3,546	2,086	391	4,269	2,622	312
11	6,394	2,924	829	5,650	2,852	381	1,493	1,094	218
12	5,975	2,526	691	2,621	2,002	516	1,588	1,024	135
13	2,056	1,385	475	2,536	2,127	476	1,758	1,244	247
14	3,501	2,065	585	3,007	2,111	455	1,971	1,275	269
15	3,623	1,824	554	2,872	1,620	282	1,701	1,443	285
16	4,625	1,938	469	2,486	1,367	257	1,671	1,103	228
17	6,226	2,450	556	3,610	2,005	427	1,566	1,287	201
18	2,029	984	295	1,855	1,218	264	1,260	989	195
19	6,750	2,499	523	2,328	1,283	205	1,470	984	153
20	2,904	1,358	338	No this chromosome			1,508	1,124	267
21	1,297	777	207	No this chromosome			No this chromosome
22	2,582	1,189	354	No this chromosome			No this chromosome
X	3,801	2,186	875	3,010	2,291	912	2,054	1,694	575
Y	324	580	392	335	423	85	42	60	15
Sum	113,138	54,099	16,001	75,959	45,765	9,469	55,761	38,882	7,468

Abbreviation: Chr.: Chromosome.

^aFrom the NCBI data base in February 2019.