| rats, inbred strains | Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. (12 Dec 1998) |
|---|---|
| rats, inbred wky | A strain of rattus norvegicus used as a normotensive control for the spontaneous hypertensive rats (shr). (12 Dec 1998) |
| rats, mutant strains | Rats bearing mutant genes which are phenotypically expressed in the animals. (12 Dec 1998) |
| rats, nude | A mutant strain of rattus norvegicus without a thymus and with depressed or absent T-cell function. This strain of rats may have a small amount of hair at times, but then lose it. (12 Dec 1998) |
| rats, sprague-dawley | A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the sprague-dawley animal company. (12 Dec 1998) |
| rats, wistar | A strain of albino rat developed at the wistar institute that has spread widely at other institutions. This has markedly diluted the original strain. (12 Dec 1998) |
| rats, zucker | Two populations of zucker rats have been cited in research--the "fatty" or obese and the lean. The "fatty" rat (rattus norvegicus) appeared as a spontaneous mutant. The obese condition appears to be due to a single recessive gene. (12 Dec 1998) |
| mole rats | Any of several burrowing rodents of the families muridae and bathyergidae, found in eastern europe, africa, and asia. They have short limbs, small eyes with permanently closed lids, and no tail. Three genera spalax (muridae), heterocephalus (bathyergidae) and cryptomys (bathyergidae) are used frequently as experimental animals in biomedical research. (12 Dec 1998) |