Sample Essay on Genetics: DNA Test and Fatal Disorders

Article Summary

The genetics article by Monte Morin of the Los Angeles Times seeks to expound some studies conducted on how DNA tests have proven reliable in the discovery of fetal disorders on fetus. The article has basically argued that accurate screening of expectant mothers can be used in identification of possible cases of genetic disorders that have been caused by excess chromosomes. DNA testing is one of the fastest, safest and most precise methods of screening pregnant mothers for chronic abnormalities such as Down syndrome. This method of testing has been adopted in different regions as standard for prenatal care. The importance of verifying the DNA method majorly emanated from the argument of some experts who complained that it is not scientifically proven.

The DNA testing has proven more effective than the non-invasive methods of screening such as ultrasound examinations. It involves what the author called parallel sequencing technology. The article posited that Down syndrome, like several other trisomies, is created when one fetus has trio copies a given chromosome as opposed to the normal two. It employs a test called Illumina test, which involves counting the number of DNA fragments associated with a specific disorder. In a situation where the fragments exceed the average number for a normal blood sample, one is warned of possible disorder on the infant, thus required to undertake a more conclusive diagnostic test.

Using an ultrasound scanner, a physician can use a hypodermic needle in drawing some fluid from the uterus, which is used for the DNA testing. This method has been approved by various authorities in study of genetics as effective and reliable for mothers who wish to be sure about their unborn children’s health.


Monte, M. (2014, February 26). Study calls DNA test reliable in discovering fetal disorders. Los Angeles Times. Retrieved from