PHP â Sort Functions For Arrays. In this chapter, we will go through the following PHP array sort functions: sort() â sort arrays in ascending order. rsort() â sort arrays in descending order. asort() â sort associative arrays in ascending order, according to the value.
Environmental factors that can affect gene expression. Exposing a fetus, infant, or child to a chemical or nutritional (or other) stressor during development can affect the risk of disease development even into adulthood. The mechanisms involved are probably epigenetics (Boekelheide et al. 2012).
Genotype + environment â phenotype. 1  Not all phenotypes are affected by environmental factors. 2  Blood type, tongue rolling etc. are determined solely by genotype and are not changed due to other factors. 3  Poor diet is an example of an environmental factor which can affect a personâs phenotypic expression. 4  E.g..