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Showing 1 to 5 of 5 for “"color polymorphism"”.
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The Maintenance of Male Color Polymorphism in Poecilia parae
<p>Genetic color polymorphisms are common in nature, and a major challenge for evolutionary biologists has been to understand how they are maintained despite the effects of directional selection. Recent studies suggest that frequency-dependent selection may explain the persistence of intraspecific …
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Causes and consequences of color polymorphism in Rambur’s forktail (Ischnura ramburii)
… in which to study how female variation evolves. Color polymorphic damselflies typically contain one female morph that resembles the male (“andromorph”) and one or more alternative morphs with distinctive coloration (“gynomorphs” or “heteromorphs”). My thesis draws upon the unique context of a …
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The relationship between fruit color traits and anthocyanin genes in diploid Fragaria
… molecular identity of the c locus (yellow fruit color) in Fragaria vesca, a diploid (2n = 2x = 14) strawberry. Using PCR with degenerate primer pairs, intron-containing segments of structural genes coding for the enzymes: chalcone synthase (CHS), chalcone isomerase (CHI), flavanone 3-hydroxylase …
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Phenotypic and Genetic Diversity in the Sea Urchin Lytechinus Variegatus
<p>Diversity in coloration is a common phenomenon in marine invertebrates, although the ecological significance of the diversity is often unknown. Patterns of geographic variability, particularly with respect to color phenotypes, are evident in many organisms and may provide visual evidence of …
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Evolution and Genetics of Floral Color Polymorphisms in Clarkia gracilis ssp. sonomensis and Erythronium umbilicatum
<p>Floral color polymorphisms are pervasive in nature. Understanding the genetic basis of such polymorphisms allows us to address major evolutionary questions including: what types of genetic changes contribute to the evolution of phenotypic diversification? Have they arisen from new or …