Which option shows all a LLELE combinations that can be used to represent a purebred animal would it be T lowercase T or TT or T lowercase T or would it be TT or lowercase TT and last would it be both lowercase TT

The correct option for representing all alleles for a purebred animal is T uppercase T or TT. A lowercase t would represent a different allele not present in the purebred animal. So, the correct combination would be TT.