HLA Genes testing, Genealogical and Ethnic Research
For your genealogical research, accurate typing of HLA genes is probably the best tool offered by modern genetics! These genes indeed inform us about many things concerning the living and the environment in which our ancestors were.
In terms of genealogical studies and determination of ethnic or tribal, the use of conventional genetic markers such as Y-STR and mitochondrial DNA proposed by many laboratories have the advantage of determining the purely paternal lineage the purely maternal.
However, we must be aware that this is only two specific lines of many who have yet equally valuable in the total chromosomal inheritance of an individual. (Each of us has N ² ancestral lines, N being the number of generations considered. Example: 10 lines = 1024 generations).
Although it is also one among others, the parental line of the HLA system is certainly an attractive alternative.
Indeed, this group of genes has the distinction of having played in every generation, and even a major asset not only for the survivability of the individual in its own environmental context but also in choosing a partner that he will have to pass on their genes to better put together the next generation, not to mention the whole context to be sentimental or passionate with this link!
Complex HLA genes have the distinction of being all concentrated in a limited region of the short arm of chromosome 6.
This concentration is, by the principles of genetics that each set of genes that is carried by a chromosome (haplotype) will be transmitted with high probability in full and without substantial modification of its sequence from generation to generation.
Most of the complex HLA genes have very high sequence variability among the world’s population (polymorphism).
This polymorphism, which can be solved by the techniques of modern molecular biology close to nucleotide (SNP: Single Nucleotide Polymorphism) – coupled with the special properties of intra-familial transmission of the haplotype allows us to apply molecular HLA typing tests of parenthood with excellent reliability.
The special properties of block transmission of ancestral HLA haplotype between several generations of his side can go back to tribal origins and ethical link to this group of genes that is essential to the survival of the individual in a particular environmental (infections bacterial, viral and parasitic existence at that time and in that place).






