Many creationists deny that primates and humans have a common ancestor, or that humans were and are lobe finned fish (and many deny that duplication can provide material for evolution to work with via duplication and subsequent neofunctionalisation/subfunctionalisation).
Chromosomal studies have shown good evidence that the original prevertebrate common ancestor had 17 chromosomes, which duplicated to form 34, after which there were seven chromosomal fusions to 27, and another round of chromosomal duplications to 54, fusions to the bony vertebrate ancestor at 50, to 48 for apes, then 46 for humans.
@colewd any thoughts? Is this evidence? Is the existence of chromosomal tetrads good evidence for two rounds of chromosomal duplications, and that you and I have a common ancestor with all vertebrates?
Or do you think God wanted to trick us, so just made it look like we had two rounds of duplication when in fact there never was?
We reconstruct the evolution of chromosomes at the beginning of vertebrate evolution. We first compare 61 extant animal genomes to reconstruct the highly contiguous order of genes in a 326-million-year-old ancestral Amniota genome. In this genome, we establish a well-supported list of duplicated genes originating from the two whole genome duplications to identify tetrads of duplicated chromosomes. From this, we reconstruct a chronology in which a pre-vertebrate genome composed of 17 chromosomes duplicated to 34 chromosomes and was subject to seven chromosome fusions before duplicating again into 54 chromosomes. After the separation of the lineage of Gnathostomata (jawed vertebrates) from Cyclostomata (extant jawless fish), four more fusions took place to form the ancestral Euteleostomi (bony vertebrates) genome of 50 chromosomes.