Hi can anyone clarify the following please

Three unrecognisable bodies are found

Genotype of bodies found at a house fire

Locus Body 1 Body 2 Body 3
D3S1358 14,19 16,18 14,18
vWA 15,21 18,18 17,21
D16S539 11,11 12,13 11,12
D2S1338 18,19 18,24 18,23
D8S1179 13,14 14,15 12,14
D21S11 29,29.2 29,31.2 29,31.2
D18S51 13,17 16,16 14,17
D19S433 13,13 12,14 13,15
THO1 9,9.3 6,7 9,9.3
FGA 22,23 19,24 23,24
Amelog XX XY XY

Am i right to state that Body 1 is a female ..
2 and 3 are male ..

I need to state whether 3 can be the son of body 1 and 2 , 4th person who could have been at the fire is missing not seen for a week after the fire ...

I am unsure in only
D3S1358, D16S539, D8S1179,D21S11, THO1, and FGA are allele present from the possible two parents !

so out of 10 markers only 6 are a match where allele are present for at least one possible parent.

is that enough to prove that the two bodies 1, 2 are parents of three how many should match ??

I felt that D3S1358 was such a good match the bodies one and two are the parents of body 3 ???

In vWA body 3 does not an allele of 15,21 or 18,18 of its possible parents

Thanks

To determine the relationships between the bodies, you can compare their genotypes at various loci. In this case, you've provided the genotypes of the bodies at several loci, such as D3S1358, vWA, D16S539, and so on.

First, let's determine the gender of the bodies. The Amelog locus indicates the presence of the X and Y chromosomes. Body 1 has the genotype XX, which indicates it is female. Body 2 has the genotype XY, indicating it is male. Body 3 also has the genotype XY, suggesting that it is male as well.

Since Body 1 is female, it cannot be the biological parent of Body 3 because it does not possess a Y chromosome. Therefore, you need to assess whether Body 2 could be the father of Body 3.

Now, to establish parentage, you need to compare the alleles at each locus. You correctly identified which loci should be considered for allele comparison, including D3S1358, D16S539, D8S1179, D21S11, THO1, and FGA.

You mentioned that out of these 10 markers, only 6 had matching alleles present for at least one possible parent. While having more matching alleles can provide stronger evidence, a certain number of matches is typically required to establish parentage. It depends on the specific criteria and threshold set by the testing method or jurisdiction.

In this case, to determine if Body 2 can be the father of Body 3, you should compare the alleles at the relevant loci in both bodies. If all the alleles at those loci match, it would provide stronger evidence of paternity. However, if Body 3 is missing alleles present in Body 2, it could suggest that Body 2 is not the biological father.

Specifically, you mentioned that Body 3 lacks the alleles 15,21 and 18,18 in the vWA locus, which are present in its possible parents' genotypes. This discrepancy weakens the evidence supporting Body 2 as the father of Body 3.

To conclusively determine the paternity, it would be better to perform more comprehensive DNA testing and analysis, including additional loci and a larger sample size. Remember, DNA testing in forensic cases like this requires rigorous analysis and expert interpretation.