Why does ionic bonding result in the formation of charges while covalent bonding does not? you : )

In the formation of an covalent bond, the electrons are shared between the atoms involved in the bonds. This way, the electron lies with both atoms, and is not completely transferred, meaning the there is no overall effect on charge.
Contrarily, in ionic bond formation, an electron is completely donated from one atom to another. The atom donating the electron is left with a positive charge due to loss of an electron, while the atom receiving the electron is left with a negative charge due to the gain of an electron.

A

Explanation:

Before humans could travel the way they do now, population was adapted to local conditions. Therefore gene frequencies were also greatly different between these populations due to these local adaptations.  However, increased ease of travel has caused increased gene flow between human populations. This means alleles are being increasingly distributed in population across the planet making the population more or less homogenous. Diversity between population therefore decreases and a decrease in diversity causes a reduced ability for adaptation towards local climatic changes.