In the context of variations of dominance, which statement best describes a recessive allele?

• A. An allele whose phenotype is masked in a heterozygote by a dominant allele and is typically expressed only in homozygotes
• B. An allele that produces an intermediate phenotype in heterozygotes due to incomplete dominance
• C. An allele that is always expressed in a heterozygote because it overrides the effect of the other allele
• D. An allele that is expressed equally with the other allele in heterozygotes due to codominance

Answer: (A)