Six cloned calves have been created from cells cultured in vitro for up to three months, confirming previous work showing that relatively "old" cells can be used to clone whole animals.
Cells from six healthy cow clones show no signs of the premature aging reported for Dolly the cloned sheep, according to researchers from Advanced Cell Technologies, Inc.
A collection of Web resources on the scientific, ethical, and legal aspects of animal and human cloning. Includes articles, books, research, and societies.
Developing transgenic in vivo and in vitro models: DNA microinjections, knock-out and knock-in mice, embryonic stem cell differentiation, inducible and conditional systems.
Offers current news stories and links to related resources. Includes a basic primer on cloning and genetic engineering. From the Association of Reproductive Health Professionals.
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