If a person has a recessive allele for a disorder and that allele is masked by the presence of a normal dominant allele, this personIf a person has a recessive allele for a disorder and that allele is masked by the presence of a normal dominant allele, this person:.

Is a carrier.

Explanation:

In genetic engineering, a carrier is simply describes an organism that carries two different forms (alleles) of a recessive gene (alleles of a gene linked to a recessive trait) and is thus heterozygous for that the recessive gene.

Even though carriers may act to convey and maintain recessive genes within a population by passing them on to offspring, the carriers themselves are not affected by the recessive trait associated with the recessive gene.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]