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DNA Applications: Paternity Testing-Part I

DNA may be small and it may seem complicatedam about to introduce to you but many of the
but the mystery behind deoxyribonucleic acidprinciples  are  still  the  same.
is unfolding quickly (even as you read this
article most likely). An increasedSome online content2 sponsored by the
understanding of DNA also continues toUniversity of Utah shows you how you can
generate ideas for real-life applications,extract the DNA from dried peas. The great
many of which are fascinating forms of DNAthing is that you can try this from home.
testing.You can take a look at the content for more
info but I will show you a quick paraphrased
How can something so small and composed ofprocess  that  can  be  followed  as  well:
seemingly obscure as deoxyribonucleic acid
play a part in our lives? One answer is the1)  Open  the  Cell
paternity  test.
The online content says you can do this with
The  Paternity  Test: One Application for DNAsome  water  and  a  blender!
A paternity test is accomplished by taking aSimply buy a bag of dried peas and blend them
sampling of a child's DNA and a parent's DNAwith  water.
to exclude or include the possibility of
parentage. Testing the DNA of a confirmed2)  Open  the  Cell's  Nucleus
parent and a potential parent can help lab
scientists determine paternity more quicklyThe online content suggests that you use
but the DNA of two parents is not required.detergent  (of  the  liquid  variety)
Lab scientists can often prove paternity by
exclusion (100% accuracy) or by inclusionOpen the cell's nucleus. Simply mix the
(99.9%  accuracy).detergent  with  the  pea  mixture.
A paternity test may seem complicated but now3) Separate the DNA from its Protective and
that it's down to a science it's not quiteArchitectural  Proteins
the mystery that it seems to have been in the
past. I found a brief online explanation1The online content suggests that you use a
which led me to additional questions,tenderizer of meats or thejuice from a
additional answers and the rest of thispineapple to separate the proteins from the
article!DNA  sample.
1)  The  Sampling4) Separate the Floating Fats and Proteins
from  the  Floating  DNA
First of all, there must be a sampling of DNA
taken from a living specimen like you or me.The online content suggests doing this by
However you can't just reach in and grab aadding  alcohol  to  the  pea  liquid
chunk of DNA like you would dig into a
cracker barrel. Nope-it's a bit moreDo not mix; the alcohol should create a top
complicated. The first step of DNAlayer  of  liquid  over  the  pealiquid.
extraction is to take a sample of blood or
saliva. (You can easily get a sample of5)  Take  a  Look  at  Your  DNA  sample
saliva by swabbing the inside of your cheek).
This "swab sample" will provide a labSince the DNA will choose "to dwell" in the
professional with a DNA sample that is stillalcohol and the fats andproteins will stay in
mixed with other molecules and chemicalthe water, the DNA should finally be visible
make-ups that you wouldn't need for theat  thispoint.
paternity test. So, you have to separate the
DNA from those other substances. It's likeOf course, with human cells, the process
separating the crackers from several othermight not be so simple, but I think the
samples  that  are  in  the  same  barrel.example mentioned above provides a good
visualization of a process that is probably
2)  The  Extractionvery  similar.
Okay. So how do the lab scientists extractTo learn more about the next steps in
DNA from the rest of the substances floatinganalyzing DNA and to learn more about how DNA
around? This is where the fun begins and youmight be used in a paternity test, please
don't even have to be a lab professional toread part II of "DNA Applications and the
try your own extraction process. Keep inPaternity Test." (To locate the article
mind however that the paternity testsimply "Google" the article title along with
extraction processes may be somewhatmy (the author's) name).
different than the process experiment that I



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