DNA testing - genetic genealogy

[marcie dean]

Hi, this is probably going to show up my ignorance on the subject but,

1. If your parents bloods were a mismatch and you had to have a transfusion does that effect the results.

Or does dna go deeper than blood groups and types.

marcie

[dazer_man]

Debbie,

Many thanks for your help.  I am beggining to understand - I think. 

In Ysearch my best matches are eight GD 3s on my 20 markers.  All originating from Europe or the USA.  Clearly GD3 on 20 markers doesn't tie things down very well either.

How do I upload my Genebase results to GeneTree?

Steve

[coombs]

I have also wondered if we could try and prove blood relationship by other methods than DNA.

[DevonCruwys]

Steve

You just need to set up a free GeneTree account. You have to enter the marker values manually.

Debbie

[DevonCruwys]

The only other way of proving blood relationships apart from DNA testing is by doing the traditional paper research and obtaining all the relevant certificates and any other information available. But of course what is written on a certificate is not always true.

Blood groups cannot be used for genealogical research, though they can sometimes reveal that a child is not the son or daughter of the father.

Debbie

[dazer_man]

Debbie,

Did that on GeneTree thanks and got a high confidence R1b1b2 subgroup classification and a nice map showing the highest density in Ireland. At least that confirms my origins are Western European!

Still only getting 18/20 individual matches at best though.

Many thanks for all your help.

Steve

[Redroger]

Regarding Marcie's question; does it then follow that a boy will be of the same blood group as his father, and a girl of the same group as her mother?

[Shropshire Lass]

Blood groups aren't sex-linked.

Have a look at the chart towards the bottom of this page - www.bloodbook.com/inherited.html - which explains the possible inheritance.

[Redroger]

Thanks for clearing that one up!