Denaturation and reannealing occur during the process. Most of the fast reannealing DNA is not transcribed. Some may assist in spindle fiber attachment during mitosis. In guinea pigs, highly repetitive sequences are found in the centromere region and may help stabilize the chromosome. Moderately reannealing DNA represents moderately repetitive sequences.
Telomeres help maintain chromosome integrity.
Telomerase can replace lost segments of telomeres. The functions of most transposons are unknown. Gene families consist of related eukaryotic genes that code for similar proteins and have similar sequences Pseudogenes code for nonfunctional mRNAs or proteins and may have been failed experiments in evolution. RNA is processed after transcription. A 3' tail are added.