![]() Instead of fusing two cells, they took nuclei out of the frozen cells and injected them directly into an enucleated egg. ![]() Researchers got around the problem of frozen cells by changing steps 3 and 4. Up until this new study, it has not been possible to fuse a beat up dead cell with an enucleated egg. The problem with a frozen animal cell is that it is dead and ice crystals have torn it apart. Here's how cloning is usually done these days:ġ) Take a cell from the animal to be clonedĢ) Remove the nucleus from an egg (this is called an enucleated egg)ģ) Fuse the two cells and let the fused cell divide a few times in a Petri dishĤ) Implant the growing embryo into a surrogate motherĥ) If everything goes well, a clone is born This is why scientists need at the very least to have an intact nucleus to clone. Scientists don't yet have the skills to take 6 feet of DNA and properly place it into the tiny space of the nucleus. The DNA is stored and packaged there in a way that only Mother Nature can do (for now). The nucleus is where DNA is kept in cells. ![]() And ideally, an intact nucleus in an intact cell. ![]() Right now, scientists need an intact nucleus to clone an animal. The bits of DNA that scientists might get from dinosaur fossils are not good enough to make a dinosaur. That is why Jurassic Park is so unlikely. ![]() Scientists need more than DNA to clone an animal. ![]()
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