A method to trace the inheritance of a trait over many generations is called a

(A) carrier tree.

(B) pedigree.

(C) phenotype.

(D) genotype.

Pedigree.

Explanation:

Pedigree analysis may be defined as the the method to determnine the family history of a particular trait. The pedigree is important to determine the disease and its inheritance pattern.

The pedigree allows the trace of the inheritance of a particular trait over several generations. The pedigree analysis determines the individual as a carrier of the trait.

Thus, the correct answer is option (B).