A certain DNA sequence is 3 bases long. How many possible DNA combinations can exist for the 3-base long DNA sequence?

This was a hard one but I did some research and I found this

Our genome has 3 billion base pairs so a naive calculation shows 3x10^36 different combinations. But that's a meaningless number. A lot of those variants would be silent mutations, i.e. changes in introns, repeated sequences, 3rd position codons, etc etc that would have no effect on the phenotype.

Hope this help

Used to water and cool climates, probably not thick coated or fluffy. they most likely have thin coats and have to survive to find food. sorry if this wasn't the answer you were looking for..: )

Called for cell.