The simian crease is one of the listed signs in Down Syndrome which would imply there's some genetic factor at play. My eldest daughter has a simian crease on one hand and the other hand is 'normal'.
Sovereign definition, a monarch; a king, queen, or other supreme ruler. See more.
The Latin word dominus, meaning âmaster,â gives us the root domin. Words from the Latin dominus have something to do with being another's master. To dominate is to have power and control over as if being someone's master. A domain, or land under the control of a government, is a land with a particular master or ruler.