A Rasta's deadlocks' length measures their wisdom, maturity, and knowledge- personal growth. Dreads indicate a Rasta's age, as well as represent their time as a Rastafarian. Growing dreadlocks is a personal journey based around learning human patience. In the Rastafarian Movement, not only is growing dreads a religious tradition, but the process encourages the human mind, soul, and spirituality to strain to the highest limits.
Not quite, Dreadlocks are a purely a thing from the African continent and diaspora, since tight coils are the only think that will hold the locks. What you're thinking of are plaits, which are more suitable for straight hair.