Paternity DNA Test Results: Odd Findings & Questions

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SUMMARY

The discussion centers on the perplexing results of a paternity DNA test involving a mother with alleles 17,21, a father with alleles 19,20, and children with alleles 19,21 (daughter) and 17,19 (son). The results raise questions about the biological relationship between the father and the children, particularly regarding the Y chromosome inheritance. The presence of multiple similar discrepancies in results prompts a recommendation for further consultation with biologists and consideration of retesting at a different laboratory to ensure accuracy.

PREREQUISITES
  • Understanding of basic genetics and allele inheritance
  • Familiarity with Y chromosome testing and its implications in paternity
  • Knowledge of DNA testing methodologies and their reliability
  • Awareness of potential factors affecting DNA test results, such as mutations
NEXT STEPS
  • Research the principles of Y chromosome inheritance in paternity testing
  • Explore the impact of environmental factors on DNA mutations
  • Learn about the protocols for retesting DNA samples in accredited laboratories
  • Investigate common discrepancies in DNA test results and their biological explanations
USEFUL FOR

Biologists, geneticists, legal professionals involved in paternity cases, and individuals seeking clarity on DNA testing results.

JustFrustrate
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Hello just reviewed some results for someone and thought it was quite odd.

Below I have included an example of what was explained to me.

Mother: 17,21
Father: 19,20
"daughter": 19,21
"Son": 17,19

By having the mother tested the "Y" chromosome should be capable of being determined.
The children are a boy and girl and being said to be both from the same father.

But with over 4 other lines within results with the exact same issue as above makes me want to ask opinions from biologists to explain if this is possible.

Are both the children from the same father? Are the kids even his?

I've read of mutating chromosomes due to smoking ect. Doesn't fit with above result.

Are theses faked results? Should they all get tested at alternate lab?
 
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There's no way anyone can answer you because those numbers could mean anything, please consult the clinic that issued this information.
 

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