Download A Terrible Beauty is Born: Clones, Genes and the Future of by Brendan Curran PDF

By Brendan Curran

Genetics and its similar applied sciences are revolutionizing the realm. The media is often ruled via controversy over the most recent genetically converted (GM) nutrition, human gene remedy or melanoma chip expertise. Maverick scientists are within the means of cloning people, and the human genome series is out there on the net. Fifty years in the past we didn't comprehend what a gene used to be; at the present time the amazing energy of genetics is being published on an unsuspecting public, and with it an entire sequence of moral dilemmas undreamt of even ten years in the past. The query now has develop into now not "can we?" yet "should we?" through demystifying genetic engineering and exploring the elemental biology of the residing international, A bad attractiveness is Born explains how clones and cloning expertise are in lots of methods extensions of techniques that ensue regularly in nature. Used correctly those procedures have the aptitude to deliver huge, immense merits; abused, they create with them power hazards that we forget about at our peril.

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Additional resources for A Terrible Beauty is Born: Clones, Genes and the Future of Mankind (Science Spectra)

Example text

Cells lacking the correct receptor remain unmoved by the presence of the hormone. 9 consequence of the proteins that it contains. Some proteins are found in every cell; others only in specialised cells. For example, the many proteins needed to degrade glucose in order to release its energy are in all cell types yet the haemoglobin protein, which carries oxygen around the body, is present only in red blood cells. The digestion and assimilation of food are further examples of specialised protein activity.

In its absence, these rays in sunlight cause DNA damage much more often than the repair system can accommodate. As a result, mutations are generated, some of which induce oncogenes and subsequently trigger the development of a skin cancer. Tobacco smoke Tobacco smoke is an even more potent source of mutagens. There are over 6,800 different chemicals in tobacco smoke and several of them cause mutations. Thus, the prolonged exposure of lung tissue to smoke causes the accumulation of oncogene mutations and the eventual onset of lung cancer.

10). This is because we carry two copies of the genetic material in our cells (one copy we inherited form our father; the other from our mother). A person can have two dominant forms of the gene (represented as AA), two recessive forms of the gene (represented as aa), or one of each (represented as Aa). Different genes encode different proteins and can be named B, C, D etc to designate that these sequences are found at separate locations along the DNA. Each on of these can be dominant or recessive giving BB, bb, Bb; CC, cc, Cc; DD, dd, Dd etc.

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