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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.

Evolutionary Psychology

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...

Hardy-Weinberg Principle

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.

Genetic Drift

Genetic Drift

Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.

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 15, 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

Is there still evolution in the human population?

Ádám Kun^1,2,3,4,5

¹Department of Plant Systematics, Ecology and Theoretical Biology, Eötvös University, Budapest, Hungary. kunadam@elte.hu.

Biologia Futura

|January 2, 2023

Summary

Humanity continues to evolve, contrary to popular belief. Evolutionary genetics and genome sequencing reveal ongoing genetic changes and recent adaptations in human populations.

Keywords:

Human genetics Migration Population structure

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Area of Science:

Evolutionary genetics
Human evolution
Population genetics

Background:

Modern medicine is often incorrectly cited as halting human evolution by removing survival selection pressures.
However, evolution can occur through mechanisms beyond survival selection, influencing allele frequencies.

Purpose of the Study:

To demonstrate that humanity is still evolving using evolutionary genetics principles.
To present evidence of recent human adaptation from genome sequencing data.

Main Methods:

Application of fundamental evolutionary genetics knowledge.
Analysis of results from human genome sequencing projects.

Main Results:

Evidence confirms ongoing evolution in humans.
Recent signs of natural selection are detectable in human genomes.
Specific examples of human adaptation are provided.

Conclusions:

Humanity is actively evolving, with ongoing genetic changes and adaptations.
Future evolutionary trajectories for humans are discussed based on current evidence.