1. Repetitive DNA sequences
Chromosomal duplications
Nuclear Genome
Genes, regulatory and non-coding single copy sequences
Whole genome duplication
Repetitive DNA sequences
45S and 5S rRNA genes
Other repeated genes
Structural components of chromosomes
Dispersed repeats:
Transposable Elements
Centromeric repeats
Telomeric repeats
Tandem repeats
Class I Retrotransposons amplifying via an RNA intermediate
Class II
DNA transposons copied and moved via DNA
Blocks of tandem repeats at discrete chromosomal loci
Simple sequence repeats or microsatellites
Subtelomeric repeats
From Heslop-Harrison et al.
See: Biscotti MA, Olmo E, Heslop-Harrison JS  Repetitive DNA in eukaryotic genomes. Chromosome Research DOI:  /s z Figure 1 Author self-archive
And
Heslop-Harrison JS, Schmidt T  Plant Nuclear Genome Composition. In: Encyclopedia of Life Sciences. eLS 2012, John Wiley & Sons Ltd: Chichester  Author self-archive .