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Home > Relationship Tests > Brother to Sister DNA testing
Full Siblingship Test – to establish whether or not siblings share the same mother and father
- Accuracy of 90+%
To establish whether or not a brother and sister have the same father AND mother. - High number of DNA regions analysed
- Uses DNA statistics to evaluate the amount of DNA sharing and to deduce a biological relationship. Full siblings have a lot more DNA in common than half siblings. Half siblings share more DNA than unrelated persons.
- For a higher accuracy, include DNA samples from parents or other siblings. This allows us to pinpoint the exact origin of each sibling's DNA.
- If you wish to test 2 or more brothers, the Y chromosome may be a cheaper option. Click for brother to brother testing options.
- If you wish to test 2 or more sisters, please see our sister to sister page.
Summary of Sibling to Sibling Testing Costs: £299 (mother's DNA included for free)
DNA Test |
With Mother's DNA |
Accuracy |
Cost |
Order |
| Brother to Brother (2 persons) |
with no Mother's
sample |
90% |
£299 |
|
| Brother to Brother (3 persons) |
with 1 Mother's sample |
95% |
£299 |
|
| Brother to Brother (4 persons) |
with 2 Mother's sample |
99% |
£398 |
Mitochondrial DNA Test – testing to a very high accuracy for the same mother only
- Accuracy of 99+%
- To establish whether or not a siblings have the same mother only.
- We sequence specific areas of DNA only inhertited from the mother (mitochondrial DNA).
- We use most respected and most widely used mitochondrial DNA analysis software in the world.
- All siblings to the same biological mother will have the exact same mitochondrial DNA sequences.
- If you wish to test 2 or more brothers, the Y chromosome may be a cheaper option. Click for brother to brother testing options.
- If you wish to test 2 or more sisters, please see our sister to sister page.
Summary of Mitochondrial DNA costs: £199 ( £99 for each extra person )
No. of persons |
Accuracy |
Cost |
Order |
| Sister to Brother (2 persons) | 99% |
£199 |
