Question

A human pedigree for a particular disease shows the trait in every generation, suggesting that the trait is: Select one:

a. polygenic b. recessive c. pleiotropic d. sex-linked e. dominant

Answer 1

E) Dominant.

Explanation:

The dominant mode of inheritance is found in pedigree if there is found trait in all generation. The presence of dominant allele is expressed in all geenrarion. because when the dominant allele is passed in offspring, then trait is found in offsprings.

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The polygenic inheritance involves more than two genes. The continuous mode of inheritance is found.

Recessive mode of inheritance is found when the trait is skipped in the generation.

Pleiotropic effect is found when one gene and encodes more than one trait, then this type of trade is known as pleiotropic trait.