Answer:
They have similar base sequences.
Explanation:
The relationship between two species might be so close that the evolution of one species affects the evoluution of the other species.
Scientists compare the DNA base sequences of different species to determine evolutionary relationships. Species that share more similarities in their DNA bas sequences are more closely related than those who share fewere similarities.Scientists hypothesize that if two species have similarities in their base sequence,they share a common ancestor.
Answer:
the similarities in the organic bases sequence
Explanation:
Generally the DNA of all organism contains sequences of 4-bases adenine, thiamine, Cytosine and Guanine.The information stored in the DNA are usually encoded by the paining of theses bases.Therefore all organisms contain specific paring of these bases, and therefore have a unique DNA.
Encoded information from DNA are transcribed as these bases to mRNA as Codons, and are translated when paired with complementary Anti codon on the tRNA.Therefore encoded information are translated as Amino acids,with three bases translating one Amino acid. Therefore the expression of theses bases is the major components of organism DNA since it represented the genetic information needed to be expressed..
Therefore if an organism is investigated to have evolved from another, definitely they must share almost the same sequence of bases . Thus their DNA should be closely match. This is what happens in DNA of chimpanzee,which is 98 % similar to man, because of similarities in the bases sequence in the two DNA s.
