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).
Gene-Environment Interaction. Science tells us that the interactions between genes and environment shape human development. Despite the misconception that genes are âset in stone,â research shows that early experiences can determine how genes are turned on and off â and even whether some are expressed at all.