Answer: Polygenic inheritance.
Explanation: Some characteristics are polygenic, meaning that they're controlled by a number of different genes. In polygenic inheritance, traits often form a phenotypic spectrum rather than falling into clear-cut categories.
To not give up —————————————————————————
Answer: type down what you remember and be specific
Explanation: how i do this is that i will type down what i remember and i will say it in a specific that your teacher will know what you are saying