The weakness of hydrogen bonds between the bases of dna allows what?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Dna replication or repair occurs in a cell in all of thw following situations except when