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 💁‍♂️. Ok, but what does that mean?

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?