Height is determinded by Multifactorial Polygenic Traits.
Polygenic traits are determined by more than one gene, with each gene providing a small, but additive effect.
Multifactorial traits are determined by interactions between a gene or genes and the environment, and do not exhibit Mendelian ratios.
Polygenic Traits Are Continuously Varying. Polygenic traits usually produce a continuum of phenotypes. Individual genes of a polygenic trait follow Mendel's laws, but together do not produce Mendelian ratios. Understood?