A kitten will be considered a cat when it's nine months old. I once read that a cat was adolescent from about 10 to about 18 months of age... I guess that means s/he's an adult past 18 months of age.
Ethnically, Mexican Americans are a diverse population including Mexicans of Indigenous ancestry, Mexicans of European ancestry (mostly Spanish), and Mexicans of Middle Eastern stock (mainly Lebanese).
Most were Mexican Americans of Spanish and other hispanicized European settlers who arrived in the Southwest during Spanish colonial times as well as indigenous Mexican Indian. Approximately ten percent of the current Mexican American population can trace their lineage back to these early colonial settlers.