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
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 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 >
Human DNA is approximately an average of 6 feet, 6 inches in total length. There are roughly 3 billion base pairs in this length, and it is divided into 23 chromosomal pairs.Full Answer >
Oxygen is essential to human bodies for survival because it provides nutrients that are then transported throughout the body by the blood. Oxygen reaches human bodies through the air before being broken down and transported.Full Answer >