what is pure line?
The definition of a pure line is a type of inbreeding where animals or plants have certain characteristics that are the same through generations.
(Or)
A breed or strain of animals or plants that maintains a high degree of consistency in certain characters as a result of inbreeding for generations.
(Or)
A breed or strain of animals or plants that maintains a high degree of consistency in certain characters as a result of inbreeding for generations.