The phenotype of an organism, this is the characteristics that are expressed, such as height is affected by a number of factors.
Genes play an important role influencing the organism's phenotype, but they are not the only factor. Environmental factors such as temperature, oxigen levels, light, humidity and the availability of nutrients can also affect the phenotype of an organism.
As an example, if we look at the height of a person, we can see that this phenptype is not only influenced by his or her genes, but also by environmental factors such as the person's nutrition. Also height can be influenced by other environmental factors such as the mother's health and nutrition during pregnancy (this could be directly related to the socioeconomic factors affecting the mother.