When both of the alleles for a trait, such as hair color, are the same, the person is said to be for that trait?

When both of the alleles for a trait, such as hair color, are the same, the person is said to be Homozygous for that trait.  It is an organism with two alleles for one trait that are the same (TT).  

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.