Results 241 to 250 of about 68,403 (272)
Some of the next articles are maybe not open access.
Color Polymorphism in Pacific Tree Frogs
Science, 1963Crosses between green and non-green Hyla regilla suggest that green color is determined by genes at two loci; each loci must have a dominant gene. Red is the result of a recessive gene and brown a dominant gene. The frequency of frogs with each color varies in different populations.
L E, RESNICK, D L, JAMESON
openaire +2 more sources
Pelage Color Polymorphism in Peromyscus polionotus
Journal of Mammalogy, 1972In addition to the normal dark brown old-field mice, a pale brown phenotype occurs on the Savannah River Plant in South Carolina. A linear model can be used to describe the reflectance spectrum of the dorsal pelage of the two color variants. The reflectance spectrum of pale brown adults had a higher intercept and slope than the darker adults. The paler
M H, Smith, J L, Carmon, J B, Gentry
openaire +2 more sources
Phytochemistry, 2013 International audienceWe describe a flower color polymorphism in Iris lutescens, a species widespread in the Northern part of the Mediterranean basin. We studied the biochemical basis of the difference between purple and yellow flowers, and explored the ...
Lucie Conchou +2 more
exaly +2 more sources
Linking color polymorphism maintenance and speciation
Trends in Ecology & Evolution, 2007Here, we review the recently burgeoning literature on color polymorphisms, seeking to integrate studies of the maintenance of genetic variation and the evolution of reproductive isolation. Our survey reveals that several mechanisms, some operating between populations and others within them, can contribute to both color polymorphism persistence and ...
Suzanne M, Gray, Jeffrey S, McKinnon
openaire +2 more sources
The functional significance of a stigma color polymorphism in Acer pictum subsp. mono (Aceraceae)
Journal of Plant Ecology, 2015 Aims Exploring the characteristics and function of a flower color polymorphism contributes to our understanding of floral evolution in angiosperms. However, little information is available on stigma color polymorphisms in flowering plants despite their ...
Da-Yong Zhang +2 more
exaly +2 more sources
Polymorphism of Human Color Vision
Optometry and Vision Science, 1976ABSTRACT The genetic polymorphism of human color vision is examined within the framework of a photopigment replacement model. An analysis of the X‐linked recessive dichromacies and anomalous trichromacies indicates that one source of variability of normal color perception may be the inclusion of several distinct phenotypes in what is ...
openaire +2 more sources
Color change and pigmentation in a color polymorphic cichlid fish
Hydrobiologia, 2018In many haplochromine cichlids, body coloration is an important communication cue during social interactions. In some cichlids, individuals can change color, but we have little information about the underlying physiological mechanisms. We examined the regulation of coloration in the color polymorphic cichlid fish Astatotilapia burtoni where males are ...
Shana E. Border +6 more
openaire +1 more source
Polymorphs and Colors of Polydiacetylenes: A First Principles Study
Journal of the American Chemical Society, 2009Polydiacetylenes (PDAs) are exceptional polymeric materials with pi-conjugated backbones. Several of them can undergo chromogenic transitions under a wide range of external stimuli. Herein we investigate the electronic structure and the resulting properties of model and experimental PDAs, by means of first principles condensed matter calculations.
Filhol, Jean-Sébastien +6 more
openaire +3 more sources
A MODEL OF ECOLOGICAL AND EVOLUTIONARY CONSEQUENCES OF COLOR POLYMORPHISM
Ecology, 2008We summarize direct and indirect effects on fitness components of animal color pattern and present a synthesis of theories concerning the ecological and evolutionary dynamics of chromatic multiple niche polymorphisms. Previous endeavors have aimed primarily at identifying conditions that promote the evolution and maintenance of polymorphisms.
Anders, Forsman +3 more
openaire +2 more sources
Spittlebug Polymorphic for Warning Coloration
Nature, 1973LINDROTH1 suggests that some insects gain a selective advantage by mimicking other insects whose striking colour patterns serve to warn potential predators of an unusually effective escape mechanism. The mimicked insects hop suddenly when disturbed, greatly lessening the probability of a predator's success.
openaire +1 more source