Question

which allele will be expressed when both a dominant and recessive allele are present in an organism? recessive only dominant only neither will

Explanation:

In genetics, when an organism has both a dominant and a recessive allele (heterozygous condition), the dominant allele masks the expression of the recessive allele. So only the dominant allele is expressed in the phenotype.

Answer:

B. dominant only (assuming the options are labeled as A: recessive only, B: dominant only, C: neither will)