How do the variations of traits like PTC tasting and tongue rolling compare to ones like height

,eye color and skin color?

They are both an inherited trait

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.