Figure 8
From: Reconstruction of the ancestral marsupial karyotype from comparative gene maps
Derivation of ancestral marsupial chromosome consisting of segments C1 to C6. The predicted therian ancestral chromosome containing segments C1-C5 essentially corresponds to four chicken chromosomes: 12, 14, Z and a large portion of chromosome 2. Inversions and addition of chromosomal segments corresponding to human chromosomes 19, 12 and 22 to the ancestral therian chromosome ultimately led to the formation of the ancestral marsupial chromosome 1.