AP BIOLOGY

Detailed explanation-1: -Chargaff’s rules state that in the DNA of any species and any organism, the amount of guanine should be equal to the amount of cytosine and the amount of adenine should be equal to the amount of thymine. Further a 1:1 stoichiometric ratio of purine and pyrimidine bases (i.e., A+G=T+C ) should exist.

Detailed explanation-2: -The rules of base pairing explain the phenomenon that whatever the amount of adenine (A) in the DNA of an organism, the amount of thymine (T) is the same (called Chargaff’s rule). Similarly, whatever the amount of guanine (G), the amount of cytosine (C) is the same.

Detailed explanation-3: -Chargaff’s rule states that the amount of adenine (A) is equal to that of thymine (T) and the amount of guanine is equal to that of cytosine (C) in an organism.

Detailed explanation-4: -Abstract. Chargaff’ s second parity rule (PR2) states that complementary nucleotides are met with almost equal frequencies in single stranded DNA. This is indeed the case for all bacterial and eukaryotic genomes studied, although the genomic patterns may differ among genomes in terms of local deviations.

Detailed explanation-5: -Purine and pyrimidine bases should be present in a 1:1 ratio in the DNA of any organism. The base pair rule is another name for Chargaff’s rule. It specifies that the amounts of guanine and cytosine be the same. While the ratios of adenine and thiamine are the same.