Can hair be used for paternity testing?
Yes, but it depends on how you extract it, here are the extraction methods.
The human body has a nucleus of cells can be used for DNA identification, as long as the test material can contain these can be. Paternity samples can be divided into two categories of regular and special samples, regular samples are blood traces, oral swabs, hair with hair follicles, special samples are many, such as: chewing gum, cigarette butts, chopsticks (cleaned before use, not cleaned after use), disposable paper cups, mineral water bottles, muscles, teeth, bones, and even fetal amniotic fluid, only the difficulty and risk of extracting DNA differs.
Experts remind that when you choose a paternity sample, you can refer to the following principles.
1, if you sample yourself or your child, it is recommended that you choose a non-invasive oral swab as the test sample.
2, if the child is under 5 years of age, it is recommended that you use a mouth swab or bloodstain as a test sample
3、If you want to identify the fetus, please visit the hospital after 16 weeks of pregnancy to take amniotic fluid as the sample.
Science: How to collect valid hair?
1、Grab the hair with your hand about 4 cm away from the root and pluck off 5~10 hairs quickly (the end of the hair can be seen clearly as a hair follicle, i.e. the white substance at the root of the hair).
2, the plucked hairs are recommended to be dried at room temperature for a few minutes and then put into bags, because the viscosity of the freshly harvested hair is large, such as immediately put into bags, the hair follicles may stick to the walls of the bags, affecting the extraction of DNA.
3、In order to ensure the test results and quality, please do not mail the hairs that have fallen off, or hairs that have been left for a long time after being plucked off.
4、Hairs of different people should be stored separately and marked well.
Correction: DNA cannot be extracted by "cutting" a hair
If I can not come to the scene, it is recommended to send blood samples, blood samples range about the size of a dollar coin, dried and sent to the test using a clean envelope package, but also can provide sperm stained toilet paper, underwear, or blood, saliva, amniotic fluid, skin, etc.. In the case of hair, the DNA must be extracted together with the hair follicle, otherwise the DNA cannot be extracted.
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