Question

In chickens, there is a mutant gene called ʺfrizzleʺ that results in weak, stringy, and easily broken feathers. When a frightfully frizzled fowl is bred to a normal chicken, the offspring are all mildly frizzled. If one breeds two mildly frizzled chickens to each other, the offspring have the phenotypic ratio of 1 normal: 2 mildly frizzled: 1 frightfully frizzled. What is the mode of inheritance of ʺfrizzleʺ?

Answer 1

codominance

Step-by-step explanation:

The mode of inheritance of frizzle is codominance.

In codominance mode of inheritance, the two alleles representing a gene exert equal effects on ech other. Both alleles contribute equally to the phenotypic (physical appearance) expression of the gene.

For example, if A and B represent alleles of the same gene that are codominant over one another, instead of A or B to be expressed in the phenotype (if A or B is dominant), AB will be expressed.