Human blood types have 3 alleles: A, B, and O. A and B are codominant, while o is recessive to A and B.
If a person has the genotype AO what is their blood type?
a. O
b. B
C. AB
d. A

D

Explanation:

A genotype of AO means that the person only has the A antigen, so their blood type is just A. AO and AA have different genotypes but the same blood type.

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)]