Results 111 to 120 of about 64,126 (157)
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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
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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
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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
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Polymorphism of Human Color Vision
Optometry and Vision Science, 1976The 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 usually described as normal
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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
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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.
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Polymorphic Composition of Colored Polypropylene Fibers
Crystal Growth & Design, 2004The investigations of the structure of polypropylene fibers colored with quinacridone and phthalocyanine pigments were carried out. The fibers were extruded from the melt at three different temperatures and were taken at three different velocities. In fibers two polypropylene modifications, the monoclinic α and the trigonal β, were observed.
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Discovery of Gynoecium Color Polymorphism in an Aquatic Plant
Journal of Integrative Plant Biology, 2008Abstract Flower color polymorphism exhibited by natural populations provides an opportunity for understanding the evolutionary mechanisms contributing to the diversity of floral morphology. However, little is known about the color polymorphism of female organs in flowering plants.
Shuang-Quan, Huang, Xiao-Xin, Tang
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Polymorphism in normal human color vision and its mechanism
Vision Research, 1990Earlier we reported that Rayleigh matches made by males with normal color vision fall into distinct groups, and proposed that this behavior reflects an X-chromosome linked polymorphism in the spectral positioning of cone pigments (Neitz & Jacobs, 1986).
J, Neitz, G H, Jacobs
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Endocrine mechanisms controlling body‐color polymorphism in locusts
Archives of Insect Biochemistry and Physiology, 2001AbstractThe present article reviews recent published and unpublished findings on the hormonal mechanisms for the control of body‐color polymorphism in locusts. Emphasis is placed on the dark color–inducing factors and their role in the induction of various types of body coloration observed under different environmental conditions.
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