This would be incomplete dominance, where dominant alleles mix. Another example of this would be the white and red flowers, how they produce pink offspring.
If you cross a white flower CWCW and a red flower CRCR
CW CW
CR CRCW CWCR
CR CRCW CWCR
The Punnett square is done with 100% pink offspring as a result of incomplete dominance.
Hope this helped you at all.
