Dna from any source contains about the same amount of guanine

Cytosine

Explanation:

DNA come in base pairs. According to the Chargaff's rule on base pairs, DNA base pairs come in a 1:1 ratio. The base pair of guanine is cytosine (Adenine pairs with Thymine). The 1:1 ratio indicates that for every 1 guanine there is 1 cytosine. So this means that there is an equal amount of guanine and cytosine.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'

answer; synapse; i believe this is correct,plz check first good luck;