tests are based on a prior probability of 50%. This means that 50%
probability is the starting point and and results that lean towards
being positive will raise that probability above 50%.
of the stated outcome is 74.62%.
siblingship index is less than 1.00, this indicates non-relatedness.
If the siblingship index is greater than 1.00, this indicates that
the two tested individuals are more likely to be true full sibling
or half siblings.
data are inconclusive but support a half-sibship relationship.
Half-sibship Index: 2.9
Probability of Half-sibship: 74.62%
only those indices in excess of 25 are regarded as conclusive evidence.
Therefore, the genetic data
in this case are, strictly speaking, inconclusive but comprise evidence
in favor of half-sibship.
a DNA paternity test which will always provide a conclusive result,
sibship tests are different. When a sibship test is conducted, the
DNA laboratory will determine the genetic profile of the alleged siblings.
Based on the type of genetic material inherited by each sibling, a
sibship index is determined. If the sibship index is less than 1.00,
this indicates non-relatedness. If the sibship index is greater than
1.00, this indicates that the two tested individuals are more likely
to be true biological siblings. The higher the value of the sibship
index, the greater is the likelihood that the two individuals are
true biological siblings.
the shared alleles:32 of 39, for
more distant familial relationships, allele sharing decreases.
sibling testing can give a strong indication of probability of a relationship
between two people, it is rarely conclusive. This is because although
2 people can share the same parent, they may only share a few of their
recognizable DNA markers.
markers tested however, the more accurate the results may be. If both
people are male, an alternative option includes Y Chromosome DNA Tests.
These can conclusively conclude if 2 men share the same father or
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