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Related Concept Videos

Synteny and Evolution02:31

Synteny and Evolution

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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.
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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
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Animal Mitochondrial Genetics02:59

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Overview
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Human Genetics01:28

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Updated: Mar 7, 2026

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
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Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

Published on: November 30, 2021

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Ancient DNA and human physiology.

Misheelt Bayarsaikhan1, Michael James Boyle1, Phoebe V Demers1

  • 1Yale School of Medicine, New Haven, CT, USA.

Physiology (Bethesda, Md.)
|March 6, 2026
PubMed
Summary
This summary is machine-generated.

Ancient DNA (aDNA) analysis reveals biological changes over time by tracking genetic shifts. This method links past genetic variations to physiological functions and evolutionary pressures.

Keywords:
EvolutionGenomicsPaleogeneticsPhysiologyancient DNA

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Last Updated: Mar 7, 2026

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Area of Science:

  • Paleogenomics
  • Evolutionary Biology
  • Genetics

Background:

  • Ancient DNA (aDNA) analysis reconstructs historical genomes from various organisms and environments.
  • Advancements in DNA extraction and sequencing enable large-scale, cross-regional datasets for evolutionary studies.

Purpose of the Study:

  • To review how aDNA research links genetic variation to physiological function within historical and environmental contexts.
  • To demonstrate how human biology evolved under selective pressures using aDNA case studies.

Main Methods:

  • Tracking temporal shifts in allele frequencies.
  • Integrating functional genomics data (gene expression, chromatin structure).
  • Modeling population demography to distinguish selection from genetic drift.
  • Aligning genetic data with archaeological, cultural, and climatic information.

Main Results:

  • aDNA studies reveal evolutionary insights into complex traits, dietary adaptations, and pathogen responses.
  • Dated genetic signals help identify past selective pressures and expose rare biological mechanisms.
  • Case studies illustrate the link between genetic changes and environmental factors over time.

Conclusions:

  • aDNA is a powerful tool for understanding human evolutionary biology and physiological pathways.
  • Methodological progress and ethical frameworks are expanding the potential of aDNA research.
  • Future research can refine understanding of the timing and drivers of biological evolution.