Changes

=== MODELING RELATEDNESS ===

=== MODELING RELATEDNESS ===

we use a variance component model to handle familial relationships. The null model is:  

We use a variance component model to handle familial relationships. The null model is:  

<math>\mathbf{y}=\mathbf{X}\boldsymbol{\beta} +\mathbf{g}+ \boldsymbol{\varepsilon}</math>

<math>\mathbf{y}=\mathbf{X}\boldsymbol{\beta} +\mathbf{g}+ \boldsymbol{\varepsilon}</math>