PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Cloning cows, selecting an egg. Researcher using a microscope to select an egg (female reproductive cell, on screen) during cloning work. This egg cell is from a cow (Bos taurus). This is the Bio Sidus biotechnology company, in Argentina, which successfully cloned a cow in 2002. The cloned cows are intended to be used to produce human growth hormone (hGH) in their milk.
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