Dictionary > Purebred


noun, plural: purebreds
An animal that is of pure breed, i.e. whose ancestors on both sides have been members of a recognized breed
Of or pertaining to an animal resulting from a cross of the same breed of unmixed lineage over many generations
A purebred refers to offspring resulting from a true breeding. True breeding is a way to produce offspring that would carry the same phenotype as the parents. Thus, a purebred would result when the parents are homozygous for certain traits. A purebred of domesticated animal or a pet animal can be achieved through the process of selective breeding. For example, two dogs of the same breed would have an offspring with rather predictable traits. Nevertheless, selective breeding between same breed would be disadvantageous in terms of gene pool. True breeding tend to limit the gene pool. A large gene pool means greater genetic diversity. And higher genetic diversity could mean increased chances of biological fitness, and therefore of survival. In contrast, a gene pool that is restricted could lead to low genetic diversity. This reduces the chances of inheriting favourable traits that increase biological fitness. Purebreds are susceptible to acquiring genetic diseases or congenital health problems because of limited gene pool.

  • purebreed
  • truebred


  • crossbred
  • See also:

    You will also like...

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    DNA molecule
    Genetic Control – On and Off Genes

    Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

    Early Earth
    The Origins of Life

    This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

    Origins of Life on Earth
    Origins of Life on Earth

    Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    Protein Synthesis

    Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..