For other uses, see Transition. Definition of transitions and transversions. In genetics, a transition is a point mutation that changes a purine nucleotide to another purine (A â G) or a pyrimidine nucleotide to another pyrimidine (C â T).Approximately two out of three single nucleotide polymorphisms (SNPs) are transitions.Transitions can be caused by oxidative deamination and tautomerization.or other uses, see Transition. Definition of transitions and transversions. In genetics, a transition is a point mutation that changes a purine nucleotide to another purine (A â G) or a pyrimidine nucleotide to another pyrimidine (C â T).
fringe benefit - an incidental benefit awarded for certain types of employment (especially if it is regarded as a right); a limousine is one of the fringe benefits of the job. perk, perquisite. benefit - financial assistance in time of need.
The SCA requires payment of a minimum âfringe benefit,â as described in the applicable WD. The health and welfare (H&W) fringe benefit is one of the required SCA fringe benefits, and the current fringe benefit is $3.81 per hour.