Cloned Cattle Can Be Healthy and Normal

摘要

The possibility of cloning humans has raised questions as to whether nuclear transfer can be used to reproducibly generate healthy adult animals. Report sin the popular and scientific press on genetic, immunological, and other developmental problems raise the question of whether there are "any normal clones in existence" (1-4). We evaluated a series of 24 sexually mature cattle, cloned from nonequiescent somatic cells as described (5,6).