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DNA

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Summary of an Online Article about DNA

Deoxyribonucleic acid, commonly abbreviated as DNA, is a molecule that encodes genetic information used during the development and functioning of living organisms. Durrett (2008) describes DNA as a double-stranded nucleic acid that carries genetic information needed for cell development, growth, division, and functionality. DNA is the genetic blueprint for any organism.

The article proposes that research studies conducted in the recent past have shown that the entire population of people on Earth is related in one way or another. One such research study was carried out on a sample of people living in forty different countries in Europe showed that all those people shared similar DNA sequences. Related people had DNA sequences that were alike. For example, it was revealed that the DNA sequences we share with our parents are long, and those we share within us and with our grandparents are half as long, and the trend goes on to our ancestors. Therefore, some scientists believed earlier that there were no people who had common DNA sequences, but the studies by Ralph and Graham Coop seemed to dispute that.

In the research study, Ralph and Graham analyzed the population sample data which constituted information on the country of origin, language, and DNA sequences of European people from five hundred thousand locations and with a sample size of several thousand people (Brown, 2013). They made use of computer programs to trace the sequences that were similar or almost similar. Interestingly, Ralph and Graham found out that all of them shared similar sequences. The only difference they noticed was in the lengths of the sequence. Ralph and Graham also found out that people who lived closer together were closely related than those living further from each other. According to this article, the research further revealed that shared ancestry goes way back to nearly one hundred generations. This is equivalent to approximately three hundred years ago. The article further asserts that based on this revelation, there is no doubt that human ancestry is interconnected.

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In addition to this, Graham and Ralph also sought to know how the shared genetic segments linked genetic disparities among people to historical trends and events (Brown, 2013). Their research studies depicted that Italians, when compared to people from other countries, are not as closely related as their counterparts. This explained the relative instability of the regions. Ralph and Graham also distinguished the closer shared ancestry among the people from south-eastern Europe. According to this article, the research technique which was adopted by Ralph and Graham has been applauded by various researchers because of its reliability. The technique has also been widely used as a critical tool for studying and determining the relationship among other living organisms.

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