Mendel conducted many experiments focused on the science of genetics and has established the laws of Mendelian inheritance. One of Mendel's conclusions is that for every trait, each pair of units (genes/alleles) separates and each parent contributes one unit to the offspring. Another conclusion is that every inherited trait is controlled by two genetic units.
Low latitude deserts approximately between 18° and 28° in both hemispheres.
Andrew Jackson had a negative impact because he would reward those loyal to him with things such as jobs, no matter if they had good skill levels for the job or not. This was highly undemocratic as not everybody had a fair chance.