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).
Combined, these insights set the conceptual stage with the realizations that balanced gene expression is important and that even incremental changes in copy number can cause mutant phenotypes. A natural extension of this concept is that intentional overexpression of individual genes might be a useful tool for connecting genes to biological pathways.