15.Regarding to genome sequences, which statements is/are CORRECT?
(A) Point mutations include transition and transversion.
(B) Transition results from the substitution of a purine with a pyrimidine, or vice versa.
(C) Transversion results from the substitution of a purine with a pyrimidine, or vice versa.
(D) When alleles of the same locus are compared, difference in a single nucleotide is called a singlenucleotide polymorphism (SNP).
(E) SNPs can be found in patients with a specific disorder.