An organism is heterozygous for a gene that follows mendel's law of dominance. which allele will be expressed as its phenotype?

a. the recessive allele will be expressed.
b. the dominant allele will be expressed.
c. neither allele will be expressed.
d. both alleles will be expressed.

Option B is correct.

Explanation:

When we cross between parents are pure with different alleles with the same traits, only one form of the trait will appear in the next generation. Offsprings dominant trait will be expressed in the phenotype. So if the individual with heterozygous that is one allele with dominant and other with recessive, only dominant allele will be expressed.

currents is the correct answer.