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The Chimeric DNA Test


The chimeric DNA test is a genetic analysis that will allow you to compare several biological samples from different parts of your body to determine if you are a carrier of a chimera!

What is a Chimeric DNA Test?

chimeric dna test

Chimerism is a situation in which an individual possesses two sets of genetic material, which is quite surprising. It is a rare phenomenon, but not impossible, which can be detected by comparing the genetic profile of your samples to determine if they are identical or not.

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The mystery of chimeras:
a fascinating exploration

To fully grasp the concept of a chimera, it is essential to delve into the stories of ancient Greek mythology. In these ancient tales, the chimera is depicted as a fantastical creature, a bizarre beast composed of parts of various animals. This image, as frightening as it may be, strikingly illustrates the genetic phenomenon we are going to examine in depth.

In the complex field of genetics, a chimera is defined as an individual who presents two distinct types of DNA.


This astonishing situation can occur when an individual :

  • absorbs their twin in the womb, a fascinating phenomenon in itself.

  • It can also occur following a blood transfusion or organ transplant,

  • where another person's genetic material is introduced into the recipient's body.


Therefore, a chimera can be conceived as an intriguing "blend" of two individuals.


Although this phenomenon is extremely rare, it often remains undetectable without a specific DNA test. This adds an extra layer of mystery to the notion of genetic chimera. This phenomenon raises a number of fascinating questions about our understanding of individual identity and genetics.

Symptoms of Chimerism

The symptoms that might indicate the presence of a chimera in your body are often subtle and can vary considerably from one person to another. Physical signs are usually the most visible.

  • For example, a person could have differences in eye color, a phenomenon known as heterochromia. This means that each eye can have a different color, or that the same eye can have different colors.

  • Another common symptom is the presence of birthmarks or skin markings of different colors. For example, a part of the skin could be darker or lighter than the rest.

  • Similarly, there could be differences in hair color or texture on different parts of the body.

Beyond physical signs, the symptoms of a chimera can also be more subtle and difficult to detect. For example, there may be genetic differences that are not immediately visible.

These differences can only be detected by a specific DNA test, which can reveal the presence of two sets of genetic material.

It is thus important to note that in some cases, a person may not exhibit any visible symptoms. This may be due to the fact that the chimera's cells are present in a part of the body that is not visible, such as internal organs.

Finally, it is essential to note that the presence of these symptoms does not necessarily mean that you are a chimera. Many other factors can lead to variations in skin, eye, or hair color, and certain medical or genetic conditions can also cause similar symptoms.

Therefore, if you exhibit any of these symptoms and think you might be a chimera, it is potentially recommended to conduct a Chimeric DNA Test.


The consequences of a chimera on the individual's health

A chimeric individual, that is, an individual possessing two different types of DNA, can have a variety of effects on their health. This can range from a total absence of symptoms to more serious health problems.

In some cases, the chimera's cells can interfere with the normal functioning of the body, causing a range of health problems.


For example, a person can develop autoimmune diseases. In these cases, the body's immune system attacks its own cells because it recognizes them as foreign. This can lead to inflammation, pain, and dysfunction of various organs, depending on the type of autoimmune disease.

In addition, a chimera can also have implications for the individual's reproductive health. In some cases, the chimera's cells can be present in the reproductive organs. This can cause fertility problems, which can make conceiving a child difficult or impossible.


In rarer cases, there may even be genetic sex differences. That is, a person possesses male and female sex cells. This can lead to sexual anomalies or gender identity problems.

However, the presence of a chimera does not always lead to health troubles. In many cases, the chimera's cells coexist harmoniously with the host's cells, without causing difficulties. In fact, the individual may not even be aware of their chimeric condition. This demonstrates the incredible ability of the human body to adapt to and handle complex genetic situations.


How to conduct the chimeric DNA test?

In the era of modern technology, it is possible to conduct a chimeric DNA test without even leaving the comfort of your home. You just need to order a test kit online. Once the kit is received, you need to collect several samples from your body - this should include hair, nails, saliva, and blood. Each sample is a collection of your cells that contain your DNA.

Once the samples are collected, you send them back to the indicated laboratory. Scientists then analyze these samples to determine if all your genetic profiles are identical, or if some show differences indicating the presence of a chimera. This detailed research can take a few weeks, but the results can give you an amazing insight into your genetic identity.

To conduct a chimeric DNA test, you can use several types of samples:

Mouth swab


A saliva sample that allows you to recover the DNA present in your mouth.

Hair sample


Collect 5 to 10 hairs with the root. Without the hair bulb, the laboratory will not be able to establish your genetic profile.

Body Hairs


Collection of hairs from several body areas. You need 5 to 10 hairs per area.


It is important not to mix hairs from different areas in order to preferably locate the area of the chimera that the laboratory may find.



Use 5 to 10 nails for this test. Please specify if the nails are from the hand or feet and avoid mixing them.


You can also make a comparison between toenails and your hand nails.

Dry blood spot


This sample must be sent to the laboratory quickly, within 10 to 15 days after collection.

Dried semen


This sample must also be sent quickly to the laboratory, within 10 to 15 days after collection.



Send 5 to 10 small pieces of skin from a specific area that you must specify.


It is important not to mix skin from several areas in order to identify where the chimera might possibly be located.

Umbilical cord


For this type of sample, you also need to send a saliva sample from your biological mother in order to isolate her DNA from the sample.



Preferably molars, to have a better chance of creating a genetic profile.

How to read the results of your chimeric DNA test?

To read a genetic profile following a DNA test, you first need to understand the key elements that compose it.

The genetic profile is presented in the form of a table in which you can see a series of numbers. These numbers correspond to the size of a DNA fragment at a specific location.

  • The specific locations in your DNA are called loci. These are markers that allow you to know the "geographical" area tested of your DNA.

  • Each locus is represented by a pair of numbers that correspond to the two versions of the gene, called alleles, that you inherited from your parents. These numbers represent the unique composition of the loci.

allele 1
allele 2

The set of numbers are in pairs, each pair represents the two alleles, or versions of the gene, that you inherited from your parents. One allele coming from the mother's chromosome and one allele coming from the father's chromosome.

The set of loci and their genetic compositions in allele is called a person's genetic profile. It is unique to each individual and only identical twins can have an identical genetic profile.

When comparing your different results, for each locus, you should find similar alleles (the same numbers) in your genetic profile and in the genetic profile of the other sample you are comparing. If this was not the case, then this could indicate the presence of a chimera in this sample.

For example, if a locus in your genetic profile is represented by the numbers 8 and 9, thus, you should find these same numbers at the same locus in the genetic profile of the other sample. If, on the contrary, the genetic profile of the other sample shows the numbers 8 and 10 at this locus, this could indicate the presence of a chimera.

It is important to note that the presence of a chimera can only be confirmed if the genetic profiles are different at several loci. A difference at a single locus may be due to a natural genetic mutation.

Interpreting a genetic profile can be complex and requires a certain understanding of genetics. If you have any questions or doubts about your results, it is recommended to consult a genetic counselor or a geneticist. They can help you understand what these numbers mean and how they relate to your health, your ancestry, or other genetic characteristics.

Ghost twins: a genetic reality?

Chimerism leads us to another just as intriguing concept: that of "ghost twins". This term refers to twins absorbed by their brother or sister in the womb, but who, although not developed, continue to influence their host.

The impact of these "ghost twins" can be significant and affect various aspects of the individual's life, ranging from psychology to health, including more everyday aspects. For example, they can influence your dietary preferences, contribute to the emergence of certain talents, or even have repercussions on your mental health.

The use of a chimeric DNA test can help identify the presence of these ghost twins. This discovery offers a new perspective for understanding and exploring your genetic identity. It's a new horizon that opens up, inviting a better understanding of what makes you a unique being.

It is fascinating to realize that these "ghost twins" can leave an indelible imprint, even though they never had the chance to fully develop. It's as if they continue to live through you, leaving their mark in your DNA. This reality seems surreal, but it is firmly rooted in the field of genetics.

The concept of ghost twins also leads us to reflect on our own uniqueness. We are all unique, moreover because of our DNA, and because of these invisible genetic influences that can subtly shape our identity.

It is also interesting to note that the phenomenon of ghost twins is not limited to humans. It has been observed in various animal species, underscoring its universality. This attests to the complexity and beauty of life, where even beings who did not have the chance to be born can leave a lasting imprint.

In the end, the discovery of the presence of ghost twins through a chimeric DNA test can be a revealing experience. It can help you better understand your genetic identity, but also appreciate the complexity and wonder of genetics. It's a journey of discovery that, while deeply rooted in science, also touches on the very essence of what it means to be human.

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