A Milestone in Cloning: Rhesus Monkey Survives Into Adulthood
In a groundbreaking achievement, Chinese scientists have cloned a rhesus monkey that has lived for over two years thus far, marking the first successful cloning of this primate species. The breakthrough utilized a modified cloning technique that replaced the cloned embryo’s placenta with that of an embryo produced through in vitro fertilization. It means the egg was fertilized outside the body, for instance, in a test tube.
The conventional cloning technique, somatic cell nuclear transfer (SCNT), often results in low birth and survival rates for cloned embryos, particularly in primates. Previous attempts at cloning rhesus monkeys had failed, resulting in few surviving births and life spans of only a few hours. After hundreds of failed cloning attempts, the research team based in Shanghai and Beijing realized that the outer membrane of the early cloned embryos did not develop properly to form the placenta.
To address this problem, the researchers replaced the cloned embryo’s outer layer with that of a non-cloned embryo. They tested this new technique on 113 cloned embryos, implanting 11 into seven surrogates. The experiments resulted in only one live birth ? a healthy male rhesus monkey named ReTro. While the efficiency of the process is far from perfect, it has many implications for cloning.
The successful cloning of a rhesus monkey opens new possibilities in biomedical research, providing opportunities to study diseases and test drugs using genetically identical primates. However, the ethical implications and concerns about animal welfare also underscore the need for careful consideration regarding the usage of cloning technology.
Hannah Kim For The Teen Times
1. What have Chinese scientists done, according to paragraph 1? What record did it set?
2. What technique was used to clone a rhesus monkey? Describe in detail.
3. What is the conventional technique used to clone rhesus monkeys? What did this result in?
4. What did researchers do to address the problems of the conventional technique?
1. Do you believe in cloning? Why or why not?
2. What are the pros and cons of cloning food?
3. What are some of the greatest scientific achievements of the 21st century? Explain.
4. What are some of the greatest problems posed by scientific achievements and technology? Explain.