DNA Barcoding and Evolution

The journal Human Evolution published an article about new research on DNA barcoding. There are two different types of DNA. Most of us know something about nuclear DNA which is the genetic blueprint for every single individual passed down from parent to offspring. The complete DNA blueprint contains more than three-billion letters and is packed into the tiny nucleus of every cell in our bodies.

The second type of DNA is found in the mitochondria of cells. The mitochondria generate energy for the cell, and mitochondrial DNA contains 37 kinds of genes. One of those is the COI gene which is used to create DNA barcoding. You could compare these DNA barcodes with the barcodes on products which we purchase from a store.

Researchers at the Biodiversity Institute of Ontario have analyzed the COI of 100,000 species by examining millions of DNA barcodes. They conclude that most animals appeared simultaneously. Researchers credited that to a sudden event that caused large-scale environmental trauma and wiped out a majority of the Earth’s species.

This is another blow to the belief of those who say gradualism is how the diversity of life-forms came into existence on the Earth. The DNA barcoding research supports the view that catastrophic events gave rise to sweeping changes on Earth which led to the emergence of new species including humans.

As more and more evidence becomes available, the credibility of the biblical account grows. Future data will help us understand more about what has happened in the past to give us the planet we call home.
–John N. Clayton © 2018