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The dog could also be simply a lap dog, a gift from husband to wife. Many wealthy women in the court had lap dogs as companions, reflecting wealth or social status. [17] During the Middle Ages, images of dogs were often carved on tombstones to represent the deceased's feudal loyalty or marital fidelity. [18]
The project took samples from 38 different breeds to find the gene (a beta defensin gene) responsible for dog coat color. One version produces yellow dogs, and a mutation produces black. All dog coat colors are modifications of black or yellow. [2] For example, the white in white miniature schnauzers is a cream color, not albinism (a genotype ...
A dog's coat is composed of two layers: a top coat of stiff guard hairs that help repel water and shield from dirt, and an undercoat of soft down hairs, to serve as insulation. [1] Dogs with both under coat and top coat are said to have a double coat. Dogs with a single coat have a coat composed solely of guard hairs, with little or no downy ...
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A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli. [1] It has been shaped by millennia of contact with humans and their lifestyles.
Mouse skin stained with Masson's trichrome stain. Masson's trichrome is a three-colour staining procedure used in histology . The recipes emerged from Claude L. Pierre Masson 's (1880–1959) original formulation have different specific applications, but all are suited for distinguishing cells from surrounding connective tissue .
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Orthodox images more often contained inscriptions with the names of saints, so the Eastern repertoire of attributes is generally smaller than the Western. Many of the most prominent saints, like Saint Peter and Saint John the Evangelist can also be recognised by a distinctive facial type. Some attributes are general, such as the martyr's palm. [4]