What type of inheritance is the following?

This type of gene is called codominance. Codominance is a relationship between two versions of a gene. It is when both traits of the parent show up on the origin. The crossbreed of a white chicken and a black chicken will produce BW chicken.

When the offspring from the black and white chicken has just white feathers, that means the white feather is dominant while the black is recessive, and if the offspring has just black feathers, that means the black gene is dominant, and the white chicken is recessive. When both feathers show in a grey form on the offspring, it shows there is incomplete dominance. Incomplete dominance is when the mixture of the genes gives a different result.

This kind of gene inheritance is known as codominance. The black chickens are all black because that’s the only gene they have for feather coloring. Same with the white chickens. However, their offspring have one black gene and one white gene. These genes have more or less become one gene and show speckled feathers instead of all black or all white.

If one gene had shown itself to be dominant, the offspring of these chickens would all been either black or white, since they all have both genes. However, if the chickens had all been gray, this would have been incomplete dominance. Since the other answers here list incomplete dominance, I’ll explain the difference. Codominance is when both traits show up - IE black and white speckled feathers. Incomplete dominance is a mixture of the two, such as when a red rose and a white rose to produce a pink rose.