Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
Speciation Rates01:07

Speciation Rates

Overview
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
Gene Evolution - Fast or Slow?02:05

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...
Gene Evolution - Fast or Slow?02:05

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...
Drift Velocity01:19

Drift Velocity

The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The anlagen of evo-devo in Fritz Müller's Für Darwin (1864).

Developmental biology·2025
Same author

The IgLON family of cell adhesion molecules expressed in developing neural circuits ensure the proper functioning of the sensory system in mice.

Scientific reports·2024
Same author

Inter-kingdom communication and the sympoietic way of life.

Frontiers in cell and developmental biology·2024
Same author

"When does human life begin?" teaching human embryology in the context of the American abortion debate.

Developmental biology·2024
Same author

Reprint of: Prelude to molecularization: The double gradient model of Sulo Toivonen and Lauri Saxén.

Cells & development·2024
Same author

Developmental process of the modern house shrew's molars: implications for the evolution of the tribosphenic molar in Mesozoic mammals.

Evolution; international journal of organic evolution·2023
Same journal

AXIN1 and AXIN2 regulate the WNT-signaling landscape to promote distinct mesoderm programs.

Developmental cell·2026
Same journal

ARID1A terminates gastric regeneration to prevent cancer.

Developmental cell·2026
Same journal

Myc sustains sex-biased organ zonation in the Drosophila intestine.

Developmental cell·2026
Same journal

Two parallel neuronal circuits involving electrical synapse and DAF-7/TGF-β signaling regulate muscle autophagy in C. elegans.

Developmental cell·2026
Same journal

Menstruation: Once unspoken but now uncovered, one cell type at a time.

Developmental cell·2026
Same journal

The ALS- and FTD-associated proteins annexin A11 and CHMP2B act sequentially in plasma membrane repair.

Developmental cell·2026
See all related articles

Related Experiment Video

Updated: May 10, 2026

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

Turtle origins: picking up speed.

Scott F Gilbert1, Ian Corfe

  • 1Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland. sgilber1@swarthmore.edu

Developmental Cell
|June 4, 2013
PubMed
Summary
This summary is machine-generated.

Three new turtle genomes reveal their evolutionary relationship to birds and crocodiles. These findings provide insights into the genetic basis of unique turtle physiological traits.

More Related Videos

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
08:41

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates

Published on: April 18, 2014

Extracellular Wire Tetrode Recording in Brain of Freely Walking Insects
15:28

Extracellular Wire Tetrode Recording in Brain of Freely Walking Insects

Published on: April 1, 2014

Related Experiment Videos

Last Updated: May 10, 2026

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
08:41

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates

Published on: April 18, 2014

Extracellular Wire Tetrode Recording in Brain of Freely Walking Insects
15:28

Extracellular Wire Tetrode Recording in Brain of Freely Walking Insects

Published on: April 1, 2014

Area of Science:

  • * Evolutionary Biology
  • * Genomics
  • * Herpetology

Background:

  • * Recent advancements in genome sequencing technologies have enabled large-scale comparative genomic studies.
  • * Understanding reptilian evolutionary history is crucial for deciphering the evolution of key vertebrate traits.

Purpose of the Study:

  • * To present and analyze the genomes of three turtle species.
  • * To elucidate the phylogenetic position of turtles within the reptile clade.
  • * To identify genetic underpinnings of unique turtle physiological adaptations.

Main Methods:

  • * Whole-genome sequencing and assembly for three distinct turtle species.
  • * Comparative genomic analyses, including phylogenetic tree reconstruction.
  • * Identification and analysis of genes associated with physiological traits.

Main Results:

  • * The genomes confirm turtles as a sister group to the clade containing birds and crocodiles (Archosauria).
  • * Genomic data provide a foundation for understanding the evolution of turtle-specific traits such as shell development and metabolic regulation.
  • * Divergence time estimates place the origin of turtles in the Triassic period.

Conclusions:

  • * The genomic data resolve the long-standing phylogenetic debate regarding turtle ancestry.
  • * These findings open new avenues for research into the genetic basis of reptilian physiology and adaptation.
  • * The study highlights the power of comparative genomics in understanding vertebrate evolution.