Endeavor DNA offers confidential, accurate, fast, and affordable avuncular testing services.
Avuncular tests calculate the likelihood of relatedness between a child and an aunt or uncle.
Because a child inherits exactly half of its genes from its biological father, and because the biological father shares (on average) half of his genes in common with his full sibling, the child will share (on average) half of its paternal genes in common with the full sibling of the biological father. Based upon the number of genetic matches, the laboratory calculates the statistical likelihood that the alleged aunt/uncle is biologically related to the child versus being unrelated.
It is important to understand that it may not always be possible to achieve a conclusive result. Even though they may have the same parents, a full sibling of the alleged father is not genetically identical to the alleged father and may have inherited numerous genetic markers that the alleged father did not.