Where does the 1/4*V_D and 1/2*V_A come from?

Hi Everyone,
In response to yesterday’s question I’ve created a video to explain where these coefficients come from:
https://www.colorado.edu/ibg/biometrical-genetics
The video is about 45 minutes but explains everything from first principles. I hope it is useful.
cheers
Dave

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Hi Dave,

Finally had the chance to look into this after the workshop – it’s so clearly explained! I only wanted to know where the 1/4 V_D came from and I got so much more from this video lecture, so thank you very much! I especially appreciate the additional resources at the end.

Best regards,

Ralph