Changes

:* '''''Long-Evans:'''''  Multipurpose model organism (frequent in behavioral and obesity research).  Developed by crossing Wistar females with a wild gray male.  They are white with a black or brown hood.

:* '''''Long-Evans:'''''  Multipurpose model organism (frequent in behavioral and obesity research).  Developed by crossing Wistar females with a wild gray male.  They are white with a black or brown hood.

[[Image:Inbred_rat_lines.jpg|thumb|300px|Inbred rat lines.]]

[[Image:Inbred_rat_lines.jpg|thumb|300px|Inbred rat lines. © Charles River Laboratories]]

 

====Strains (~inbred strains)====

====Strains (~inbred strains)====

A '''strain''' is a group of organisms of the same species, having distinctive characteristics but not usually considered a separate breed or variety (can be termed '''inbred strains''').  This is accomplished through inbreeding with the aim of excluding genetic variation as a factor in experiments.  Examples:

A '''strain''' is a group of organisms of the same species, having distinctive characteristics but not usually considered a separate breed or variety (can be termed '''inbred strains''').  This is accomplished through inbreeding with the aim of excluding genetic variation as a factor in experiments.  Examples: