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).
For example, Mexico's white population is 9% or about 17% only, while Mexico is majoritarily mestizo, meaning that have European descent and Native American descent at an extent while 52.8% of Mexican Americans are White, or identify themselves as white in the Census (See the table).