Developments in the biological sciences in the
last years have changed mankind's ability to
manipulate the genetics, cell biology and physiology of
biological organisms. These techniques, collectively
termed biotechnology, create the opportunity for
modifying domestic animals in ways that markedly
increase the efficiency of production. Among the
procedures being developed for animal production
systems are marker-assisted selection of specific alleles of
a gene that are associated with high production,
production of transgenic animals, production of large
amounts of previously-rare proteins through use of
genetically-engineered bacteria or other cells and
identification of new biologically-active molecules as
potential regulators of animals function.peer-reviewe
