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mouse speciation observed - evidence for evolution?
what do anti-evolutionists think of this
Britton-Davidian collected hundreds of mice from about 40 locations around the island and found six distinct populations. The common brown house mouse of Europe, presumably the ancestor of the Madeira mice, has 40 chromosomes, but the six families of Madeiran mice have between 22 and 30.
The current families of Madeiran mice are not short of genetic material. They have not lost any DNA. What happened is this: over time, some of the chromosomes fused together, packing more DNA into some chromosomes. Each of the six unique populations of mice on Madeira has its own special assembly of fused chromosomes. Each group of mice may now be its own species.
The diversity of fused chromosomes seems to have occurred in just 500 years, or between 1,500-2,000 generations of mice, says Britton-Davidian. Furthermore, the huge diversity in chromosomes has evolved solely from geographic isolation rather than adaptations to different environments.
1 Answer
- nossonLv 41 decade agoFavorite Answer
I believe in macroevolution for certain reasons like we all share the same kind of DNA.
What you have here is not evidence for macro-evolution.
The definition of macroevolution is not clearly defined but many use it to refer to the adding or changing the DNA makeup of a gene (or more). Fusing chromosomes doesn't require adding or changing the DNA makeup of a gene and therefore is not evidence for macroevolution.
Speciation does not require adding or changing the DNA makeup of a gene and therefore is not evidence for macroevolution.
