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The Evidence for Evolution

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...

Genomics

Genomics

Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...

What is Evolutionary History?

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.

Types of Genetic Transfer Between Organisms

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.

Synteny and Evolution

Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...

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Related Experiment Video

Updated: Aug 12, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Medical biology in France: evolution and issues

Dominique Bonnefont-Rousselot¹, Marc Delpech², Philippe Chatron¹

¹Membre de l’Académie nationale de pharmacie

Annales De Biologie Clinique

|January 25, 2023

Summary

Medical biology faces significant challenges due to financialization and a lack of regulation, leading to a decline in laboratory services and a worrying disaffection among young professionals. Recommendations aim to revitalize the field for future innovation.

Keywords:

artificial intelligence big data financialization medical biology laboratory technological innovation

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Last Updated: Aug 12, 2025

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Area of Science:

Medical biology's critical role in patient care, disease diagnosis, monitoring, and therapeutic advancements.
The intersection of medical biology with emerging technologies like AI, big data, and connected devices.

Context:

A follow-up report highlights a severe deterioration in medical biology services since 2018.
Public authorities' failure to regulate has led to excessive financialization and consolidation of Medical Biology Laboratories (MBLs).
MBLs are becoming mere sampling sites, with patients receiving uninterpreted results, increasing anxiety.

Purpose:

To analyze the current state and future challenges facing medical biology.
To identify the negative impacts of financialization and inadequate regulation on MBLs and patient care.
To propose recommendations for the future of medical biology.

Summary:

The report details a significant decline in medical biology, characterized by excessive financialization, consolidation of MBLs, and a reduction in essential services.
There is a concerning trend of MBLs becoming simple sampling centers, leaving patients without proper interpretation of their diagnostic results.
The field suffers from a lack of innovation and a worrying disaffection among young professionals, despite incredible scientific progress.

Impact:

The current trajectory poses risks to patient care and the future of medical biology as a discipline.
Urgent regulatory and strategic interventions are needed to address the deterioration and foster innovation.
Recommendations are provided to guide MBLs into a new era, ensuring continued relevance and advancement.