Ribosomal RNA (rRNA) associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis.
You didn't put the answer choices but it should be D)L<span>ymph vessels, thymus medulla, thymus cortex</span>
Either could be heterozygous or homozygous, as the dominant will show and the recessive won't in both cases. Unless, of course, the individual has two dominant trait, in which case they would show both.