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Heritability (3): Non-additive effects dominance

Dominance is a just a fancy-schmancy way of saying that the phenotypic effects of alleles at a single locus are not additive ๐Ÿ’โ€โ™‚๏ธ. Ok, but what does that mean?

What your genetic ancestry test can and cannot tell you about your genealogical ancestors

The topic of this post was not on my radar ๐Ÿ“ก but I donโ€™t live under a rock and Iโ€™ve been following the recent developments with Elizabeth Warren and her much publicized ancestry results.

Heritability (2): narrow and broad sense heritability

Quick recap: I mentioned last time that heritability = Vg / Vp, where Vg is the genetic variance among individuals and Vp is the total phenotypic difference among individuals. Furthermore, Vp = Vg + Ve, where Ve is the environmental variance contributing to phenotypic differences.

Heritability (1): How 'genetic' is a trait?

One of the reasons I’ve come to write about this is because recently I’ve been asked a lot about “how genetic is this trait or that trait?”. And I find myself responding with another question (yeah I’m that guy , get over it): “What do you mean by genetic?