I've blogged previously on the subject of pseudogenes and how they can constitute evidence for common ancestry. In short, they can represent the remnants of genes that once served a specific purpose in our distant ancestors, but were lost in a particular lineage for one reason or another. Imagine if there were a "gill gene" … Continue reading Tomkins on the Human Vitellogenin Pseudogene: Who Needs Signal When You Have Noise?
The purpose of this post is to outline 3 lines of evidence from the field of human genetics that clearly demonstrate that the slow accumulation of mutations over generations is responsible for the genetic diversity of modern human populations, and that the same process is responsible for the genetic differences we have compared with chimpanzees, … Continue reading Human Genetics Confirms Mutations as the Drivers of Diversity and Evolution
I’ve written about pseudogenes before on this blog, but I focused on their application to dating species divergence times and their implications for common ancestry amongst those species. This time I’m going to focus on their ability to inform us about the phenotypes of an animal's evolutionary ancestors. The principle is simple, and I’ll illustrate … Continue reading Pseudogenes Testify to the Evolutionary History of Animals
One of the most common charges levied against evolutionary biology is that it's a useless science with no applications in the real world. If this was true it wouldn't do anything to tarnish the validity of the evolutionary biology research, despite what many anti-evolutionists would have you believe. After all, the mark of a valid … Continue reading Applications of Phylogenetics in Medicine and Public Health
In the final hours of 2016, I published a blog post discussing the fusion of human chromosome 2 and its implications for evolution versus creationism in the light of Bayesian probabilities. I walked through the simple maths demonstrating that contrary to what might seem intuitive, the fusion does in fact lend evidentiary support in favour … Continue reading Chromosome 2 Fusion and Bayes Theorem: Addendum
In 2013, a paper was published by researchers from New Zealand in the journal PLOS ONE entitled "Beyond Reasonable Doubt: Evolution from DNA Sequences". After reading it recently, I was surprised to find that it seems to have flown under the radar in popular science circles. I couldn't find any references to the article in … Continue reading Testing a Strong Prediction of Universal Common Ancestry
Two weeks ago, an article was published online in the inaugural issue of the new journal Nature Ecology & Evolution entitled "Experimental test and refutation of a classic case of molecular adaptation in Drosophila melanogaster". As the title suggests, the article soundly refutes a classic example of molecular adaption that was first established in a seminal paper by McDonald and … Continue reading Alcohol Tolerance in Fruit Flies: A Classic Case of Molecular Adaptation Refuted