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Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
Culling is: ... the rejection or removal of inferior individuals from breeding. The act of selective breeding. As used in the practice of breeding pedigree cats, this refers to the practice of spaying or neutering a kitten or cat that does not measure up to the show standard (or other standard being applied) for that breed.
The existence of limits in artificial selection experiments was discussed in the scientific literature in the 1940s or earlier. [1] The most obvious possible cause of reaching a limit (or plateau) when a population is under continued directional selection is that all of the additive-genetic variation (see additive genetic effects) related to that trait gets "used up" or fixed. [2]
The animal rights group Four Paws says selective breeding is focused more on appearance than behavior, and that it disregards the effects breeding can have on a dog's behavior. The group says that ...
A 1930s exhibit by the Eugenics Society.Some of the signs read "Healthy and Unhealthy Families", "Heredity as the Basis of Efficiency" and "Marry Wisely".Eugenics (/ j uː ˈ dʒ ɛ n ɪ k s / yoo-JEN-iks; from Ancient Greek εύ̃ (eû) ' good, well ' and -γενής (genḗs) ' born, come into being, growing/grown ') [1] is a set of beliefs and practices that aim to improve the genetic ...
Inbreeding is a technique used in selective breeding. For example, in livestock breeding , breeders may use inbreeding when trying to establish a new and desirable trait in the stock and for producing distinct families within a breed, but will need to watch for undesirable characteristics in offspring, which can then be eliminated through ...
Sexual selection's role in human evolution cannot be definitively established, as features may result from an equilibrium among competing selective pressures, some involving sexual selection, others natural selection, and others pleiotropy. Richard Dawkins argued that
The underlying idea is to improve the genetic basis of future generations and reduce incidence of genetic diseases and other undesirable traits. Some of the practices included in new eugenics are: pre-implantation diagnosis and embryo selection, [4] selective breeding, [5] and human embryo engineering and gene therapy. [6] [7]