The chromosome 2 fusion model of human evolution—part 2: re-analysis of the genomic data | The Institute for Creation Research
 
The chromosome 2 fusion model of human evolution—part 2: re-analysis of the genomic data

by Jeffrey P. Tomkins, Ph.D., and Jerry Bergman, Ph.D.

In Journal of Creation 25 (2): 111-117, August 2011

A major argument for human evolution from a shared common ancestor with the great apes, particularly chimpanzees, is the ‘chromosome 2 fusion model’. This molecular model involves the hypothetical fusion of two small acrocentric chimpanzee-like chromosomes (2A and 2B) at some ancient point in the human evolutionary lineage. Our analysis of the available genomic data shows that the sequence features encompassing the purported chromosome 2 fusion site are too ambiguous to accurately infer a fusion event. The data actually suggest that the core ~800 bp region containing the fusion site is not a unique cryptic and degenerate head-to-head fusion of telomeres, but a distinct motif that is represented throughout the human genome with no orthologous counterpart in the chimpanzee genome on either chromosome 2A or 2B. The DNA sequence evidence for a purported inactivated cryptic centromere site on chromosome 2, supposedly composed of centromeric alphoid repeats, is even more ambiguous and untenable than the case for a fusion site. The alphoid sequences in this region are quite variable and do not cluster with known functional human centromeric sequences. In addition, no ortholog for a cryptic centromere homologous to the alphoid sequence at human chromosome 2 exists on chimpanzee chromosomes 2A and 2B.

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