Human cloning - Wikipedia
Human cloning is the creation of a genetically identical copy of a human. The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and tissue. It does not refer to the natural conception and delivery of identical twins. The possibilities of human cloning have raised controversies. These ethical ...
The First Human Cloned Embryo - Scientific American
2001年11月24日 · In the basic nuclear transfer technique, scientists use an extremely fine needle to suck the genetic material from a mature egg. They then inject the nucleus of the donor cell (or sometimes a whole...
Tracking single-cell evolution using clock-like chromatin ... - Nature
2024年5月9日 · In this study, we developed a method, called EpiTrace, that counts the fraction of opened clock-like loci from scATAC-seq data to determine cell age and perform lineage tracing in various cell...
Why haven't we cloned a human yet? - Live Science
2022年5月9日 · Some people suggested that human clones could play a role in eradicating genetic diseases, while others considered that the cloning process could, eventually, eliminate birth defects (despite...
Mutational scanning identified amino acids of the CLOCK exon …
2022年2月3日 · Here, we systematically investigated the role of individual amino acids of the CLOCKΔ19 domain for CLOCK function and circadian rhythm dynamics in human cells. Using a newly developed CLOCK knockout and CLOCK rescue system in combination with a mutational scanning approach, we identified critical amino acids that recapitulated the CLOCKΔ19 ...
Human Cloning: Unmasking the Controversy - Harvard Science …
2014年1月22日 · Many ethical arguments against cloning technologies and embryonic stem cell research argue that doing such research inherently destroys human life. We cannot dismiss these arguments, as they propose a valid question, that is—how do we define a human life?
Genetics of the human circadian clock and sleep homeostat
2019年8月10日 · Nearly all living animals, from mammals to prokaryotes, have an internal clock adapted to the Earth’s rotational schedule of 24 h [1]. This internal circadian rhythmicity allows the body to...
Keeping time with the human genome | Nature
2001年2月15日 · The cloning and characterization of ‘clock gene’ families has advanced our understanding of the molecular control of the mammalian circadian clock. We have analysed the human genome for ...
Cloning Fact Sheet - National Human Genome Research Institute
2020年8月15日 · There are three different types of artificial cloning: gene cloning, reproductive cloning and therapeutic cloning. Gene cloning produces copies of genes or segments of DNA. Reproductive cloning produces copies of whole animals.
How Human Cloning Will Work - HowStuffWorks
Human cloning has been an ethical issue ever since the first sheep was cloned in 1997. Learn about the science behind human cloning.