Suggest reasons why the pairs of bases always involve one purine and one pyrimidine base, never two purines or two pyrimidines.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

it’s lava came from an explosive eruption

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

cells spend most of their time in interphase