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. 2006 Jul 21;2(7):e109. doi: 10.1371/journal.pgen.0020109

Figure 3. The Karyotype of Hoffmann's Two-Toed Sloth (2n = 50) Closely Resembles the Proposed Eutherian Ancestral Karyotype (2n = 48).

Figure 3

(A) G-banded karyotype of a male C. hoffmannii (2n = 50) with the corresponding human chromosomes indicated to the left of each chromosome. (B) Diagram of C. hoffmannii chromosomes. (C) The proposed ancestral Eutherian karyotype (2n = 48) [17,21]. In (B) and (C), the corresponding human chromosomes are each represented by a different color, and their numbers are indicated at the bottom of each chromosome. The chromosomes are drawn only roughly to scale. In (C), the corresponding C. hoffmannii chromosomes are indicated to the left of each ancestral chromosome. The asterisks and lines show the chromosomes that differ between the karyotypes of C. hoffmanii (CHO) and those proposed as ancestral (ANC) for Eutheria (CHO 14 and ANC 10q and 10p [black asterisks]; CHO 13 and 19 and ANC 8q [green asterisks]; and CHO 20 and 21 and ANC 7b/16p [red asterisks]).