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General => Ancestral Family Tree DNA Testing => Topic started by: Kessa on Friday 31 July 20 23:30 BST (UK)

Title: Different cM between mather & daughter matches
Post by: Kessa on Friday 31 July 20 23:30 BST (UK)
Hi
I'm reposting my query as my original post seems to have been hijacked by another poster.

My husband has Ancestry DNA shared matches with a lady and her daughter.  The daughter shares more DNA with my husband than the mother does.  The mother shares 35 cM and the daughter 39 cM.
Would someone explain to me please how this can be?
Thank you
Title: Re: Different cM between mather & daughter matches
Post by: Ruskie on Saturday 01 August 20 06:28 BST (UK)
Not sure who ‘hijacked’ it, but here is a link to the other thread:
https://www.rootschat.com/forum/index.php?topic=835205.9
Title: Re: Different cM between mather & daughter matches
Post by: Kessa on Saturday 01 August 20 06:34 BST (UK)
Thanks but I knew where the link was, but someone else replied to my query with a query of their own and the conversation went on with answers to their query and not mine.
Title: Re: Different cM between mather & daughter matches
Post by: Ruskie on Saturday 01 August 20 06:45 BST (UK)
I thought everyone was giving examples of similar anomalies with their own DNA matches.

There doesn’t seem to be a definitive answer as to how that sort of DNA variation happens.

Others might be able to offer further examples or explanations.  :)
Title: Re: Different cM between mather & daughter matches
Post by: Kessa on Saturday 01 August 20 08:00 BST (UK)
They were but the replies were directed to pharma T's question and not mine.  Maybe that's how Roots Chat works, I don't use it that often.
Title: Re: Different cM between mather & daughter matches
Post by: Nanna52 on Saturday 01 August 20 08:50 BST (UK)
All I can say kessa is that it happens.  On a couple of occasions my son has slightly higher matches than I do with a match.  In the scheme of things 4cM is nothing. 
Title: Re: Different cM between mather & daughter matches
Post by: brigidmac on Saturday 01 August 20 09:55 BST (UK)
For myself and my mothers dna it happens a few times at lower levels
The only match we have at a higher level where the son matches more than his mother is because his grandfather on his fathers side is also a match to our family .
Title: Re: Different cM between mather & daughter matches
Post by: Maiden Stone on Saturday 01 August 20 13:11 BST (UK)
I thought everyone was giving examples of similar anomalies with their own DNA matches.

There doesn’t seem to be a definitive answer as to how that sort of DNA variation happens.

Others might be able to offer further examples or explanations.  :)

That's what I thought from reading the original thread.
Title: Re: Different cM between mather & daughter matches
Post by: IgorStrav on Saturday 01 August 20 13:38 BST (UK)
I thought everyone was giving examples of similar anomalies with their own DNA matches.

There doesn’t seem to be a definitive answer as to how that sort of DNA variation happens.

Others might be able to offer further examples or explanations.  :)

That's what I thought from reading the original thread.

The discussion on the original thread was targeted on establishing what might be the explanation of the DNA variation example quoted by Kessa.

This included various examples (including one of mine) which sought to help.

Please don't think, Kessa, that here we are in the habit of 'hijacking' threads for our own purposes.

It's just that I don't think we've been able to come to an answer, and unfortunately two threads about the subject might make the query more confusing. 

Title: Re: Different cM between mather & daughter matches
Post by: Kessa on Wednesday 05 August 20 05:25 BST (UK)
Thanks to everyone who posted a reply.
Regards & keep safe,
Kessa
Title: Re: Different cM between mather & daughter matches
Post by: frankie-d on Wednesday 05 August 20 18:01 BST (UK)
I've had this happen on one of my matches. I think it means you're also related to the daughter on her father's side as well as her mother's. Can't think of any other explanation.

Frank
Title: Re: Different cM between mather & daughter matches
Post by: Sprinkles on Tuesday 01 September 20 16:34 BST (UK)
I have dna matches where I am related to them through both my mum and my dad and have quite often found that I will have a higher match than my mum does with some of them.  There is never a massive difference in cm and they are all quite distant.

So somewhere far back my mum and dad may have shared a common ancestor.  They both had ancestors who lived in the same county in Ireland so it is very possible.