Which of the following conditions represent a case of co- dominant genes ?

• A. A gene expresses itself , suppressing the phenotypic effect of its alleles.
• B. enes that are similar in phenotypic effect when present separately, but when together interact to produce a different trait.
• C. Alleles, both of which interact to produce effect in homozygous condition
• D. Alleles, both of which interact to produce an independent effect in heterozygous condition.
• E. cessive