A pure line is a breed of an organism that has resulted from repeated self-fertilization and has become homozygous for a specific trait.
If bred with another true-breeding organism, the trait is passed down to progeny.
A group of plants or animals that share a characteristic that has remained unchanged over many generations.
The organisms are homozygous for the feature in question and are said to ‘breed true.’
It is the result of inbreeding to keep certain characteristics the same across generations.
A pure line is the result of a specific flower’s inbreeding to help it fight diseases.
Final Answer: A pure line is a breed of an organism that has resulted from repeated self-fertilization and has become homozygous for a specific trait.