Answer: The correct answer is -
DNA (deoxyribonucleic acid) is considered as the genetic material of living organisms that is transferred from one generation to the next generation in the form of nucleotide sequences.
DNA is transcribed (formation of mRNA from DNA) and translated to form protein (that is a sequence of amino acids).
By comparing the sequence of amino acid between two organisms, we can deduce their genetic relatedness.
In other words, if two organsims show similar amino acid sequence, it means that they possess similar DNA sequence (that contains the code for amino acids).
Thus, it can be concluded that comparing amino acid sequences of two organisms can indicate about their genetic relatedness and if so (that is if amino acid sequence matches), they are considered to be evolved from common ancestor.
