Second Cockatiel
Well, the girls in my family did it. They bought a second cockatiel to keep Sunshine company. So far, the new bird has been absolutely silent. She won't be out of her cage for a little while, so that's where I took this photo. My daughter hasn't named her yet (nor are we sure that's she's not a he).

Mutations aren't sex-linked
Mutations aren't sex-linked traits, but your bird is indeed a lutino, or a lutino pearl.
You can't really tell a lutino cockatiel's sex just by looking at it. I have identified my lutino cockatiel to most likely be a female from her behaviour, how she is very cuddly and doesn't whistle.
Your new birdie is very adorable :) I wish you the best of luck with her (or him)
               Previous Posts:
               Crime tried to happen to me Thursday
               Kel-Tec's New Lightweight PF-9 9mm Auto Pistol
               Credo
               Quote
               The Ron Paul Revolution
               There Is No President
               True Democracy or, Let's Kill Frank & Steal His Shit
               "Resistance is Futile": Waco Rules vs. Romanian Rules
               CO2: The Greatest Scientific Scandal of Our Time
               The Global Marijuana March, May 5th 2007
             

It looks like a lutino, a
It looks like a lutino, a sex-linked trait, which means it is most probably a male.
Edit comment