How To Perform A DNA Sample Collection for DNA Testing
Kevin Camilleri asked:
DNA testing is most accurate method for confirming biological relationships between individuals. The most common form of testing nowadays is DNA Paternity testing, which is done to confirm the relationship between an alleged Father (and sometimes Mother) and a child.
If you are planning to do a DNA Paternity test, or any other DNA Relationship test, the following article provides you information on how to go about taking a sample of your DNA for DNA testing purposes.
The object of the exercise is to obtain a sample of cheek cells from which the scientists at the lab can extract DNA to match and identify genetic relationships. To do this, you’re going to need to take a swab sample from all of the parties involved, that is the mother, father and the child in a traditional paternity test situation. Don’t worry – it’s not at all painful and the whole process is very simple and straightforward.
To start with, instruct everyone partaking in the DNA test to avoid eating and drinking for at least half an hour prior to giving their sample to avoid any contamination of the sample that may negatively effect the testing. Additionally, it’s also advisable to avoid smoking for a period of one hour prior to submitting the sample for DNA testing.
The samples once collected should be clearly marked, labelling both the name and relationship of the party involved on the envelope provided, as well as in the submission sheet you should be provided with the DNA testing kit. The samples of each person should also be kept separate to avoid any risk of cross contamination which would also negatively the results of the DNA test. Normally the envelopes provided are colour coded to provide some form of differentiation. Clear administration of the samples is of paramount importance in protecting the accuracy of the test; therefore it is critical that you follow all instructions contained within your DNA kit sample pack.
When it comes to actually taking the samples, you will require two cotton swabs per person to ensure that in the event one of the swabs does not work, a second sample is available. With the swab end kept free from contact with anything that may contaminate the DNA, rub firmly against the inside of the cheek and tongue to gather saliva and cells which will contain the vital DNA material. In isolation from potential contaminants, and having refrained from touching the cotton end of the swab, the swab should be allowed a minimum period of around 60 minutes to dry off before it is sealed ready to go to the lab. Repeat this process for all the swabs required for each person taking the paternity test.
Once you’ve collected all the relevant samples and filled in the necessary documentation, it is time to send the pack off to the laboratory performing the DNA testing. It is normally advisable to send the DNA samples through a postal method that can be tracked such as registered mail or courier to ensure it arrives at the DNA testing laboratory.
Depending on how long your particular choice of testing laboratory tends to take, you could be waiting anywhere from a number of days to a number of weeks for the results of the DNA test to arrive.
Genetic Biotechnology
DNA testing is most accurate method for confirming biological relationships between individuals. The most common form of testing nowadays is DNA Paternity testing, which is done to confirm the relationship between an alleged Father (and sometimes Mother) and a child.
If you are planning to do a DNA Paternity test, or any other DNA Relationship test, the following article provides you information on how to go about taking a sample of your DNA for DNA testing purposes.
The object of the exercise is to obtain a sample of cheek cells from which the scientists at the lab can extract DNA to match and identify genetic relationships. To do this, you’re going to need to take a swab sample from all of the parties involved, that is the mother, father and the child in a traditional paternity test situation. Don’t worry – it’s not at all painful and the whole process is very simple and straightforward.
To start with, instruct everyone partaking in the DNA test to avoid eating and drinking for at least half an hour prior to giving their sample to avoid any contamination of the sample that may negatively effect the testing. Additionally, it’s also advisable to avoid smoking for a period of one hour prior to submitting the sample for DNA testing.
The samples once collected should be clearly marked, labelling both the name and relationship of the party involved on the envelope provided, as well as in the submission sheet you should be provided with the DNA testing kit. The samples of each person should also be kept separate to avoid any risk of cross contamination which would also negatively the results of the DNA test. Normally the envelopes provided are colour coded to provide some form of differentiation. Clear administration of the samples is of paramount importance in protecting the accuracy of the test; therefore it is critical that you follow all instructions contained within your DNA kit sample pack.
When it comes to actually taking the samples, you will require two cotton swabs per person to ensure that in the event one of the swabs does not work, a second sample is available. With the swab end kept free from contact with anything that may contaminate the DNA, rub firmly against the inside of the cheek and tongue to gather saliva and cells which will contain the vital DNA material. In isolation from potential contaminants, and having refrained from touching the cotton end of the swab, the swab should be allowed a minimum period of around 60 minutes to dry off before it is sealed ready to go to the lab. Repeat this process for all the swabs required for each person taking the paternity test.
Once you’ve collected all the relevant samples and filled in the necessary documentation, it is time to send the pack off to the laboratory performing the DNA testing. It is normally advisable to send the DNA samples through a postal method that can be tracked such as registered mail or courier to ensure it arrives at the DNA testing laboratory.
Depending on how long your particular choice of testing laboratory tends to take, you could be waiting anywhere from a number of days to a number of weeks for the results of the DNA test to arrive.
Genetic Biotechnology
The Basics of Forensic Dna Testing and the Ethics Behind it
Grant Kretzer asked:
Although DNA testing is something that is used primarily by scientists who can use and interpret DNA and the results of testing processes, DNA in recent years has become a fantastic tool for use in forensic science. Used by police forces to try and determine which of many suspects might be the one who is guilty, this form of testing makes for exceptional evidence gathering and a near faultless method of proving who is guilty. However, the science behind the forensic testing of DNA by the general population is usually left unknown. So, what really does happen?
DNA Forensic Testing – Example
For the sake of this information, assume a person was raped and murdered, and there are a number of potential suspects. Who did it? Was it the boyfriend, or was it someone else? Let’s assume that there is a semen sample obtainable from clothing or from the victim. Semen carries sperm cells which carry DNA and because of that, they can run a gel electrophoreses on the sample of DNA to try and compare the fragments of DNA that appear.
A gel electrophoreses, in layman terms, is where the laboratory fragments the DNA by use of an endonuclease and then sends an electrical charge through the DNA. The fragments move up the gel based on their molecular charge, molecular weight, and a number of other factors. However, it is not just this gel that you need as a forensic scientist. What they are looking for is comparisons between the DNA taken from the rape victim, as well as the DNA from the boyfriend (if he obliges to submit a sample) and the DNA found in the other suspects. If the forensic scientist then compares the gels and observes that the semen is not the boyfriend’s, but someone else’s it is likely that a potential suspect will have been identified.
DNA Forensic Testing – Is it Ethical?
However, is this an effective and ethical method? The argument that it is ineffective would be a hollow one, given the range of supporting evidence in favour of the accuracy of DNA testing. The above example, and the widespread use of this technology, supports a firm argument that DNA is an extremely useful method of determining who is guilty in the case of a crime scenario.
Because the human genome has been mapped and scientists are able to determine, more and more personal information, like what diseases you may have be genetically predisposed to from your DNA, it becomes a much more of a personal issue. The argument with DNA databases is that you’re storing information that can be used for more than just identification. The argument then becomes ‘should ethics get in the way of truly determining who is guilty?’
That comes down to people’s constitutional rights and the government’s position on the issue. We are more likely to see a push from the authorities to give greater power to law enforcement agencies to be able to collect DNA samples with more ease and thereby populate further the databases. The greater the database the more chances there are of identifying a suspect and solving a crime. However, human rights groups will argue that this is an invasion of privacy and collection of DNA samples should be limited in scope. The debate goes on.
Genetic Kits
Although DNA testing is something that is used primarily by scientists who can use and interpret DNA and the results of testing processes, DNA in recent years has become a fantastic tool for use in forensic science. Used by police forces to try and determine which of many suspects might be the one who is guilty, this form of testing makes for exceptional evidence gathering and a near faultless method of proving who is guilty. However, the science behind the forensic testing of DNA by the general population is usually left unknown. So, what really does happen?
DNA Forensic Testing – Example
For the sake of this information, assume a person was raped and murdered, and there are a number of potential suspects. Who did it? Was it the boyfriend, or was it someone else? Let’s assume that there is a semen sample obtainable from clothing or from the victim. Semen carries sperm cells which carry DNA and because of that, they can run a gel electrophoreses on the sample of DNA to try and compare the fragments of DNA that appear.
A gel electrophoreses, in layman terms, is where the laboratory fragments the DNA by use of an endonuclease and then sends an electrical charge through the DNA. The fragments move up the gel based on their molecular charge, molecular weight, and a number of other factors. However, it is not just this gel that you need as a forensic scientist. What they are looking for is comparisons between the DNA taken from the rape victim, as well as the DNA from the boyfriend (if he obliges to submit a sample) and the DNA found in the other suspects. If the forensic scientist then compares the gels and observes that the semen is not the boyfriend’s, but someone else’s it is likely that a potential suspect will have been identified.
DNA Forensic Testing – Is it Ethical?
However, is this an effective and ethical method? The argument that it is ineffective would be a hollow one, given the range of supporting evidence in favour of the accuracy of DNA testing. The above example, and the widespread use of this technology, supports a firm argument that DNA is an extremely useful method of determining who is guilty in the case of a crime scenario.
Because the human genome has been mapped and scientists are able to determine, more and more personal information, like what diseases you may have be genetically predisposed to from your DNA, it becomes a much more of a personal issue. The argument with DNA databases is that you’re storing information that can be used for more than just identification. The argument then becomes ‘should ethics get in the way of truly determining who is guilty?’
That comes down to people’s constitutional rights and the government’s position on the issue. We are more likely to see a push from the authorities to give greater power to law enforcement agencies to be able to collect DNA samples with more ease and thereby populate further the databases. The greater the database the more chances there are of identifying a suspect and solving a crime. However, human rights groups will argue that this is an invasion of privacy and collection of DNA samples should be limited in scope. The debate goes on.
Genetic Kits
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