Category Archives: genetic genealogy

Genomic variation in sharing between siblings

Siblings of the same sex resemble each other to varying degrees. For most traits this is mostly due to differences in the environment between them, and its effects on their development. However, siblings also subtly differ in their genomic similarity, … Continue reading

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How many genomic blocks do you share with a cousin?

Thanksgiving is over, although you fridge may still be full of leftovers. You probably spent your time wondering exactly what you have in common with your cousin, other than your loathing of brussels sprouts. I’m a British ex-pat so I … Continue reading

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How many genetic ancestors do I have?

In my last couple of posts I talked about how much of your (autosomal) genome you inherit from a particular ancestor [1,2]. In the chart below I show a family tree radiating out from one individual. Each successive layer out … Continue reading

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How much of your genome do you inherit from a particular ancestor?

How much of your genetic material do you inherit from a particular ancestor? You inherit your mitochondria through your matrilineal lineage (your mum, your mum’s mum, your mum’s mum’s mum and so one) and your Y chromosome from your patrilineal … Continue reading

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How much of your genome do you inherit from a particular grandparent?

You’ve got two copies of each chromosome, having received one copy of each chromosome from your mother and one chromosome from your father (this is true for your autosomes, but not for your X, Y, and mitochondria). When it comes … Continue reading

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“Ask me anything” Reddit on our European ancestry paper

Peter Ralph and I are doing an “Ask me anything” on our paper about the Recent genetic genealogy of Europe over at the askScience reddit http://www.reddit.com/r/askscience/comments/1ee560/askscience_ama_we_are_the_authors_of_a_recent/ today [May 15th]. Feel free to pop by and ask us questions.

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Identification of genomic regions shared between distant relatives

We’ve been addressing some of the FAQs on topics arising from our paper on the geography of recent genetic genealogy in Europe (PLOS Biology). We wanted to write one on shared genetic material in personal genomics data but it got … Continue reading

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