The correct answer is A. It is represented by a lowercase letter.
Step-by-step explanation:
In genetics, a recessive allele is a type of gene that can only lead to a phenotype with another recessive allele, because this allele is masked or dominated by dominant alleles. Additionally, they can be inherited from any of the parents and the case of analyzing alleles these are always represented using a lowercase letter while dominant alleles are represented with an uppercase letter that shows their prevalence and dominance over recessive alleles. According to this, the statement that is true about a recessive allele is that it is represented by a lowercase letter.