| MadSci Network: Genetics |
The answer rather depends on your definition of blonde. Walk into any supermarket and check out the hair coloring aisle. There are many different shades of blonde. Hair (and skin) color do not follow simple Mendellian genetics because "color" is defined by the expression of more than one gene. Basically the idea is that each of the genes express melanin -- the coloring pigment -- that then mixes for the actual color. How many genes and how much each gene expresses and when are all variables. That's why there are so many shades of different colors for hair and skin. It's unlikely that in the pairing you asked about that the child will have white blonde hair like the mother nor will the child have the same shade of hair color as the father. The hair color will probably be a darker shade of "blonde" and could even be a light brunnette.
Try the links in the MadSci Library for more information on Genetics.