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Genetic Screening PowerPoint Presentation

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Slide 1 - GENETIC SCREENING
Slide 2 - What is genetic screening? One of the fastest moving fields in medical science. A technique to determine the genotype or phenotype of an organism. It is often used to detect faulty or abnormal genes in an organism.
Slide 3 - Some examples of genetic tests Prenatal screening Newborn screening Carrier screening
Slide 4 - Prenatal Screening This can detect a disorder before a baby is born. An ultrasound test is used to determine if the fetus is at a high or low risk from a genetic disorder. Disorders are diagnosed by examining a small amount of fetal cells. This carries a small risk to the fetus. If diagnosed early in the pregnancy, there is still the possibility of abortion. Prenatal screening is sometimes seen as controversial.
Slide 5 - Newborn Screening Newborns are tested for diseases and early diagnoses allows for immediate treatment. A blood sample is tested for genetic disorders. In most of the USA, newborn screening is mandatory, unless parents have a religious objection to it. Sometimes residual blood samples are used for genetic research, as long as the samples are kept anonymous.
Slide 6 - Carrier Screening This involves testing prospective parents for diseases that they show no symptoms of, but may carry a recessive gene for. A blood sample or cheek cell sample is analysed to determine whether either parent carries a faulty gene. If both parents carry a specific faulty gene, the chance of the fetus receiving the gene from both parents is 25%, and the chance of being a carrier is 50%. If both parents carry a faulty gene, they may decide to have prenatal testing on the fetus.
Slide 7 - Other types of screening Preimplantation screening: Screening embryos fertilised by IVF before they are implanted into the uterus. Presymptomatic screening: Screening to predict adult-onset diseases such as Huntington’s disease. Presymptomatic screening: Screening to estimate the risk of developing cancer or Alzheimer’s disease as an adult. Forensic/Identity testing: Screening to eg. determine the father of an individual (paternity test).
Slide 8 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.