F13 lecture 14

Height in height data 2013 y 05495x 31044 r 017659

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Unformatted text preview: f regression – developed by Francis Galton, late 1800s –  Biometrician school (rivaled the Mendelian school in the early 20th cent.) –  regression (slope) virtually always less than 1; offspring “regress” toward parental mean •  if only one parent data is used –  slope is an esImate of ½ of the heritability •  that parent only contributed ½ the nuclear genes to the offsprimg •  VA can be esImated using offspring- parent Covariance (later lecture) Bio 321 F12 height data R2 = 0.42 h2 (slope) = 0.74 Bio 321 F12 height o- p regression offspring avg. height (in) 75 70 65 60 55 50 61 62 63 64 65 66 67 parents' avg. height (in) 68 69 70 Bio 321 F12 height o- p regression R2 = 0.42 h2 (slope) = 0.74 70 65 60 55 50 61 62 63 64 65 66 67 68 69 70 parents' avg. height (in) Height data 2013 y = 0.5495x + 31.044 R² = 0.17659 75.00 offspring mean offspring avg. height (in) 75 R2 = 0.18 h2 (slope) = 0.55 70.00 65.00 60.00 55.00 60 62 64 66 68 parental mean 70 72 74 Handedness data: not enough left-...
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This document was uploaded on 02/27/2014.

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