In chickens, black and white feathers are codominant. Heterozygous chickens have a checkered pattern. A checkered hen is crossed with a checkered rooster. What are the expected ratios of each genotype and phenotype?
1:4 expected to be black
1:2 expected to be checkered
1:4 expected to be white
Incomplete dominance: heterozygous phenotype is between the homozygous phenotypes
Example: Pink flowers when crossing red and white flowers.