Andysen Agaba
How ready are our DNA testing patterns?
By Andysen Agaba
Paulo Kafeero’s case is possibly a case of Chimerism a rare condition where a person carries two genes.
Chimerism is a rare condition where one person carries two different sets of DNA in the same body.
It can happen when two early embryos fuse very early in development, or in rare cases after procedures like an organ or bone marrow transplant.
A person with chimerism can produce children with two DNAs. One group of children test positive while another test negative.
This is a rare condition but occurs and Kafeero could be one of those few.
Chimerism is as rare and as difficult to believe by a lay person as SUPERHETEROFECUNDITION ( twins but each with own father). Chimerism is a scientifically recognized but extremely rare genetic condition in which one person carries two distinct sets of DNA. In exceptional cases, it can complicate DNA-based paternity testing, making a biological parent appear unrelated to their own child if only one tissue sample is tested. Because of its rarity, suspected cases require advanced genetic analysis using multiple tissue samples before any conclusions can be drawn.
If a man is a chimera, his body may contain two different sets of DNA.
His sperm could originate from one genetic line, while a cheek swab or blood sample used for a DNA test could come from the other. In that situation:
All of the children could biologically be his.
Some children might match the DNA sample that was tested.
Others might appear not to match, even though they are also his biological children.
However, this is extremely rare and cannot be assumed without specialized genetic testing using samples from multiple parts of the body.
In a case involving disputed or unusual DNA results, the findings would typically not be treated as conclusive based on a single test alone.
The samples may be referred to a more specialized laboratory, such as the Uganda Virus Research Institute in Entebbe or another international accredited reference laboratory, where advanced genetic testing equipment and a broader team of specialists can conduct further analysis.
This is especially important in rare situations, such as suspected chimerism or other genetic anomalies, to ensure the most accurate conclusion.
The writer is a Consultant on Foreign Diplomacy.
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