Answer: A) polygenic inheritance; genotype
Explanation: Polygenic inheritance is a type of inheritance not attributed to gene dorminance in the case of Arlo, who has a dorminant gene for tallness Ă nd later didn't become tall. Polygenic traits do not completely follow Mendel's law of inheritance,they can be influenced by other factors such as the environment.
Genotype is the entire genetic make-up of an organism that influences the overall organism.
Unlike phenotype that completely follows Mendel's law of inheritance.