In humans the genetic commonality of height and skin tone is that they are both

Answer

They have polygenic inheritance and are also affected by the environment factor.

Explanation

The trait of height and skin tone are controlled by different genes and are also affected by environmental factors. The skin tone and height within the population is not specific, both have wide ranges varies from high expression of the gene to less or even no expression of the gene. Mostly these factors are mostly affected by inheritance and less by environmental factors.

Polygenic traits

Explanation:

Polygenic traits are traits that are controlled by more than one gene and the physical expression of these genes is significantly influenced by environmental conditions. Characteristics that show continuous variations are controlled by many genes. The genes that control them may be located near each other or even on separate chromosomes. They are often represented as a range of continuous variation because they are not discrete.