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Genetic Diseases

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´╗┐Human Gene Therapy Every person carries about half a dozen defective genes. Most of us do not suffer any harmful effects from our defective genes because we carry almost two copies of all genes, one gene from our mother and the other from our father. Because in general, the possible harmful gene is recessive, its normal counterpart will transmit all the tasks assigned to both. Many if not most genetic disorders are inherited as a simple recessive traits. The most common genetic disorder are Cystic fibrosis, Sickle cell anemia, and Hemophilia effecting more than 12,000 children each year in the UK alone. Sickle cell anemia is caused by a defect in the gene that controls the production of normal hemoglobin, which is an iron-containing protein in red blood cells that transports oxygen from the lungs to body tissues. The defective gene results in the production of abnormal hemoglobin known as hemoglobin S. ...read more.


Hemophilia A , the most common form is caused by the lack of factor VIII. In the second most common form of hemophilia, hemophilia B (also known as Christmas disease), protein factor IX is absent. hemophilia is carried by females however those affected are almost always males. X-linked traits are typically passed from mother to son, never father to son because males receive no X chromosome from their father. Of course, the mother can also pass the recessive allele to her daughter, but unless the daughter receives another such allele from her father, she will not express the traits. (NHS choice) Furthermore, Cystic fibrosis is an inherited disorder affecting the glands that produce body fluids or secretions. CF is caused by a single incorrect gene found on chromosome 7,that controls the movement of water and salt in the body. To inherit CF, a child must inherit two defected gene from both parents. Most common symptoms include recurrent and severe chest infections, passing of large, foul-smelling motions and liver failure. ...read more.


Even though, early 2010, consumers were close to being able to pick up genetic test but now can only purchased online, raises some ethical theory, religious and societal question about the reliability and whether consumers can absorb some tests which can cause emotional distress or concern to those taking them.(Roberts,2010) Muin Khoury’s Group compared two tests available in the US which state to measure cancer risk. “Both look for more than a dozen genes, but only two gene appear in both tests” he said, “ if that’s the case, why by a test?.” Another argument suggests that genetic test is very expensive costing about £400 per person or £700 for a couple and that it is a waste of time and money. And there is no evidence that it will work.(Rebecca,2007) Others scientist have different opinion about genetic test. Balaji Srinivasna chief of technology officer said that it is something couples should consider before having a baby. Alan,T also argues by saying that some diseases are horrible and this is the only way to reduce the risk at fair cost with counseling.( Rebecca,2007) ...read more.

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