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Table 2 Total numbers of inter- and intrachromosomal rearrangements since divergence from avian ancestor 100 MYA

From: Reconstruction of gross avian genome structure, organization and evolution suggests that the chicken lineage most closely resembles the dinosaur avian ancestor

Species Ostrich Chicken Turkey Duck Zebra finch Budgerigar
No. of interchromosomal changes (as determined by FISH) from avian ancestor 0 1 1 0 2 8
No. of interchromosomal changes (determined using bioinformatics) from avian ancestor 26 1 5 1 2 40
No. of intrachromosomal changes from avian ancestor in chromosomes 1–5 (excluding 4p) 44 22 46 40 54 52
No. of intrachromosomal changes from Neognathae ancestor in chromosomes 6–28 + 4p + Z Not applicable 25 32 49 71 82