How A DNA Test Works

DNA is a nucleic acid that stores all information about genetics. DNA is what determines the type of hair, skin color, and special characteristics of humans. The method used in DNA testing is to identify fragments from DNA itself. Or, simply, DNA testing is a method for identifying, collecting, and inventorying typical characters’ body files. On the other hand, you may also need to see the best extracción de ADN equipment for your lab.

Inside the cell nucleus, DNA forms a unity of strands called chromosomes. Every normal human cell has 46 chromosomes consisting of 22 somatic chromosome pairs and 1 sex chromosome pair (XX or XY).

Each child will receive half a pair of chromosomes from the father and half the other pairs of chromosomes from the mother so that each individual carries traits inherited from both mother and father.

Everyone has a double helix DNA or a double chain, one chain is lowered from the mother and one chain is lowered from the father. This is what can reveal the origin of the offspring. This can be seen from the composition of the child’s DNA when compared to the parents. If the composition of the mother and father’s DNA is in the child, it means that the child is a biological child.

What body parts can be used for DNA testing?

Almost all parts of the body can be used for DNA test samples, but what is often used is blood, hair, saliva, and nails. The DNA sample used can be from the cell nucleus or the mitochondrion. Nevertheless, the most accurate is the cell nucleus because the cell nucleus cannot change. Blood samples are the most commonly used samples. However, what is taken is not red blood cells but white blood cells, because red blood cells do not have a cell nucleus.

Can the fetus in the womb be tested for DNA?

The answer is possible but full of risks. For the fetus in the womb, DNA testing is carried out by taking amniotic fluid or amniotic fluid through an amniocentesis procedure or by chorionic villus sampling which takes samples of placental tissue. However, both types of tests on the fetus have the risk of making the mother experience a miscarriage. So, discuss it with your doctor first.


Author: Richard T. Starkey

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