In chickens, the allele for black feathers is co-dominant with the allele for white feathers. Black-feathered and white-feathered birds are for either the black (B) allele or the white (W) allele. The genotype of an offspring of a black rooster and a white hen is and has a of (BW). The of the offspring shows .

Codominance and incomplete dominance go hand and hand with each other, but specify different colorings in offspring.

Codominance is the occurrence where both colors in the genotype (physical appearance) are present in the phenotype (genetic make-up).

In this scenario, a black hen (B) and a white hen (W) come together to create codominant offspring, this means both black and white feathers will be in the offspring (BW).

If it were an offspring with incomplete dominance, the genotype would still be (BW), but instead of having both colors present in the phenotype, they would be mixed, and probably make a gray color.

chordata is the answer