In biology lessons, students of tenth grades of Russian educational institutions will learn basic information about phenotypic variability, thanks to which they may well give the correct answer to this question.
The narrow rate of reaction has high -quality signs of a phenotype (for example, such as eye color, color, structure, blood group, fatty milk).
The quantitative signs of the phenotype (productivity, consciousness of livestock, egg production and the like) have a wider rate of reaction.
The breadth of the reaction rate is usually due to the genotype and directly depends on the degree of importance of a certain sign in the life of the body.