Category Archives: genetic genealogy

Where did your genetic ancestors come from?

[Part of a continuing set of blog posts on genetics and genealogy] In the last post I described how you are descended from a vast number of ancestors, from all over the world. But how much of your genome traces … Continue reading

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Your ancestors lived all over the world

In the last post I discussed the idea that that we are all related in the recent past (building off the work of Chang, Derrida, and colleagues). This idea can be confusing; for many of us our ancestors all seem … Continue reading

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Our vast, shared family tree.

You might not like to admit it, but you’re related to me. It’s very unlikely that you’re my sibling (I’m not even sure if my family read these posts). You’re one of over seven billion people alive today, and I … Continue reading

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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

Posted in genetic genealogy, personal genomics, popgen teaching | 22 Comments

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

Posted in genetic genealogy, personal genomics, popgen teaching | 53 Comments