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Mouse Facts

The "laboratory mouse" originated from a mixture ofM. m. domesticus,M. m. musculus, andM. m. molossius subspecies. An inbred strain of the laboratory mouse is defined as a strain that has been brother/sister mated for 20 or more consecutive generations and can be traced to a single ancestral pair. For further information about inbred strains of mice seeStrains, SNPs and Polymorphisms.

Mouse Genome Length Estimates

2,716,965,481 bp	Reference assembly (C57BL/6J, "golden path") length: the sum of non-redundant top level sequence regions(J:80507).
2.5 x 10⁹ bp	Mouse Genome Sequencing Consortium. 2002. Initial sequencing and comparative analysis of the mouse genome. Nature 420: 520-562.
1355.5 cM	BSS and BSB crosses: Rowe LB; Barter ME; Kelmenson JA; Eppig J. 2003. Genome Res 13(1):122-33 (J:81431).
1450 cM	Copeland, NG, et al. 1993. Science 62:57-66. (J:14384).
1360.9 cM	Dietrich, WF et al. 1996. Nature Mar 14:380(6570)149-52 ( J:34212).

Mouse Chromosomal Size

Chromosome Mapped
Length (cM) Total Estimated Size (Mbp)
(NCBI build GRCm39)
1 98.5 195
2 103.9   182
3 82.7 160
4 88.6 157
5 90.2 152
6 79.0 150
7 89.1 145
8 76.2 130
9 75.1 124
10 77.9 131
11 88.0 122
12 63.9 120
13 67.3 121
14 66.4 125
15 59.0 104
16 57.8   98
17 61.3   95
18 59.4   91
19 56.9   61
X     169
Y   91
MT 16299 bp
Total:      1441.2 2723

Codon Usage

: CUTG:Codon Usage Tabulated from Genbank

Mouse Physiology

The estimates below are based on information inBiologyof the Laboratory Mouse (the Staff of The Jackson Laboratory, E. Green, ed. 1966, Dover Publications, New York) and in theMouse Phenome Database (MPD) at The Jackson Laboratory.: Note: Strain variation can affect these values significantly.
General: Body weight: average ~20 g; highly variable; Mouse Phenome Database:body weight; Body Temperature: ~36.9 C (in addition to strain, variables are age, sex, environmental conditions); Lifespan: 1.3 - 3 years; highly variable
Reproduction: Sexual maturity:after ~4 weeks of age; highly variable; Estrus cycle frequency: every ~4-5 days; Gestation: Average 19-21 days; Litter size: usually 1-10 pups - highly variable due to geneticand environmental factors; tends to increase for the first few litters, then decrease with age; Reproductive lifespan of a female: approaches 2 years in somestrains; Lactation: duration ~4 weeks; Mouse Phenome Database:reproduction data
Circulation: Total serum protein: ~4-7 g/100 ml; Blood volume: ~5.5 ml per 100 g body weight; Heart rate: Adult: 632 +/- 51.3 beats per minute; Newborn: 286 +/- 56.8 beats per minute; Mouse Phenome Database:cardiovascular; Systolic pressure: 83-164 mm Hg; Blood pH: 7.3-7.4; Mouse Phenome Database:pH,blood chemistry
Respiration: Respiratory rate: ~163 per minute; Mouse Phenome Database:respiratory function; Tidal volume: ~0.15 ml
Urinary Tract: Average urine output: ~1.6 ml per 24 hr; Average water intake: ~ 5 ml per 24 hr

Contributing Projects: Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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