The linked page has a graph showing the hertiability of the height of parents and their children. In this context hertiability is the slope of the line of the plot between the height of parents and the height of the children. This is simple example that may be a very good teaching tool. As far as an analogy describing this, I don't know.
Feel free to be the first
Please review the linked page for context.
If you can think of something better than this,
please add it to the database