Despite the prevalence of cloning in science-fiction books and movies, as of 2014, there is no evidence that a human being has ever been cloned. Scientists have cloned other animals, including sheep, mice, cows and even a rhesus monkey, but research into human cloning is hindered by unresolved ethical questions.
Reproductive cloning involves removing the nucleus from an egg cell and fusing the enucleated egg with another cell taken from the body of the egg donor. This fusion produces an egg cell with a genome identical to the donor. Donor and baby would be as similar as two identical twins, only with very different ages. While the scientific barriers to human cloning are probably surmountable, the ethical implications involved in creating a duplicate of another human being have led many countries around the world to adopt laws prohibiting reproductive human cloning.Learn More
A human being is born with 33 separate vertebrae, although by adulthood, that number usually shrinks to 24. This phenomenon occurs because nine vertebrae fuse together during the formative years.Full Answer >
The function of deoxyribonucleic acid (DNA) is to give genetic instruction to organic beings. DNA stores information to tell cells how to function, passing it on to the next generation of life through cells. It also helps in development.Full Answer >
The Human Genome Project is an ambitious attempt to catalog and trace the origin of each piece of the human genetic code. As a result of this ongoing study, many traits have been followed back to their first appearance within the human species.Full Answer >
The Human Genome Project was first proposed at a conference in 1986 when scientists from the United States created plans to sequence the entire human genome. The project itself officially began in 1990.Full Answer >