Chickens that have the dominant allele of the frizzle gene (f_) have feathers that curl outward. chickens that are ff have feathers that lie flat against their bodies. chickens with f alleles—along with producing defective feathers—have higher metabolic rates, abnormal body temperatures, high blood flow capacity, and low egg-laying rates. this is an example of:

Pleiotropy.

Explanation:

Pleiotropy may be defined as when the single gene shows the multiple phenotypic traits. The gene is known as the pleiotropic gene and its mutation may affect the several phenotype expression.

The frizzle gene control the multiple phenotype effects like defective feathers, high blood flow, low egg lay rates and high metabolic rates. This is a case of pleiotropy because here a single gene is responsible for the multiple phenotypes.

Thus, the answer is pleiotropy.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.