South Korea cloned cows with frozen techniques

South Korean media reported that the country has succeeded in cloning a black cow that died three years ago by cooling and defrosting eggs very quickly.

Last weekend, Professor Park Se-pill and expert Mirea Biotech led the research team of Jeju National University, saying they have succeeded in developing a new, permissive " cooling and thawing " technique. clone a series of animals even after they are dead.

The researchers transplanted the cell nucleus from a dead cow into the eggs to create an embryo through artificial insemination.

Then they freeze the embryo at 196 degrees Celsius, and keep them for three years before thawing and transplant them into the womb of the replacement cow from January last year so that the cow can spawn naturally .

After 10 months, the breeding cows were born naturally and the DNA test results showed that they had the same gene as the dead cow.

The Park Se-pill said that embryo cloning is difficult, and what we need to do to commercialize embryo production at all times is to realize refrigeration and thawing techniques. Up to now, we have overcome this biggest obstacle.

Last year, Korean researchers succeeded in cloning a two-year-old bull by using cloned embryos before being chilled.