Spider X Pied = ?

[Freakie_frog]

I am fairly new to BPs and genetics, but I think I have understood most of the simple recessive & dominant/co-dominant traits.

My question is, what happens when you combine a co-dominant with a simple recessive trait?

For example, I have a spider and would like to pair it up with a piebald. What's the result?

Does the punnett square look like this:

N p*
a Na ap*
a Na ap*


So would I get 50% het pieds and 50% spider pieds?

Thanks!
Markus

spiders Het pied and normals het pied