If you breed a normal to a stripe (and it doesn't matter which is male and which is female) you will get normals het for Stripe.
If you breed a normal to a homozygous motley (again, doesn't matter which is male) you will get normals het for Motley.
If you breed a Motley to a Stripe, because they are both flavours (alleles) of the same gene and Motley is dominant to Stripe, you will get ALL Motleys het for stripe. They could look like Circleback motleys, like stripey motleys or like anything in between - but if you get any true four-lined Stripes you know your Motley was het for Stripe.
Motley and stripe are one of the really confusing genes in corns to work with
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- Ssthisto
"My bum has been a bum for a very long time, but that doesn't mean I have to listen to what it says."
- Terry Pratchett, Fifth Elephant