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Related Concept Videos

Color Vision01:24

Color Vision

648
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Photoreceptors and Visual Pathways01:22

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Vision01:24

Vision

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Colour patterns: Predicting patterns without knowing the details.

Timothy E Saunders1, Antónia Monteiro2

  • 1Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, UK; Department of Biological Sciences, National University of Singapore, Singapore; Mechanobiology Institute, National University of Singapore, Singapore.

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|December 6, 2022
PubMed
Summary
This summary is machine-generated.

Reaction-diffusion models accurately predict adult animal skin patterns, even without knowing the molecular basis. This research offers insights into the evolution of complex animal coloration.

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Area of Science:

  • Developmental biology
  • Evolutionary biology
  • Animal coloration

Background:

  • Animals exhibit a vast diversity of color patterns.
  • Understanding the developmental mechanisms generating these patterns is a key challenge in evolutionary biology.

Purpose of the Study:

  • To investigate the predictive power of reaction-diffusion models for animal skin patterning.
  • To explore the implications of these models for understanding the evolution of complex patterns.

Main Methods:

  • Studied five species of lizards.
  • Applied reaction-diffusion models to predict skin patterns.

Main Results:

  • Reaction-diffusion models demonstrated remarkable predictive accuracy for adult skin patterns.
  • Predictive power was achieved despite unknown molecular details of pattern formation.

Conclusions:

  • Reaction-diffusion models are valuable tools for understanding animal pattern evolution.
  • These models offer a framework for studying pattern development across diverse species.