Which symbol represents a hybrid a aa b bb c de d cc answer fattt

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

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)]