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Black wolves were occasionally reported in Asia.The "Derboun" of the Arabian mountains and southern Syria was a small black wolf which apparently was considered by the Arabs to be more closely related to dogs, as they freely ate its flesh like any other game, unlike with regular wolves which had an unpleasant odour. [5]
The total number of genes that contribute to eye color is unknown, but there are a few likely candidates. A study in Rotterdam (2009) found that it was possible to predict eye color with more than 90% accuracy for brown and blue using just six SNPs. [16] [17] In humans, eye color is a highly sexually dimorphic trait. [18]
Life restoration of Canis mosbachensis, the wolf's immediate ancestor. The phylogenetic descent of the extant wolf C. lupus from the earlier C. mosbachensis (which in turn descended from C. etruscus) is widely accepted. [14] Among the oldest fossils of the modern grey wolf is from Ponte Galeria in Italy, dating to 406,500 ± 2,400 years ago. [15]
In one experiment studying eye development, University of Maryland scientists transplanted lenses from the eyes of sighted surface-form embryos into blind cave-form embryos, and vice versa. In the cave form, lens development begins within the first 24 hours of embryonic development, but quickly aborts, the lens cells dying; most of the rest of ...
[17] [18] [19] The eastern wolf's morphology is midway between that of the gray wolf and the coyote. [10] The fur is typically of a grizzled grayish-brown color mixed with cinnamon. The nape, shoulder and tail region are a mix of black and gray, with the flanks and chest being rufous or creamy. [18]
A fictitious color or imaginary color is a point in a color space that corresponds to combinations of cone cell responses in one eye that cannot be produced by the eye in normal circumstances seeing any possible light spectrum. [4] No physical object can have an imaginary color.
The red wolf's taxonomic classification as being a separate species has been contentious for nearly a century, being classified either as a subspecies of the gray wolf Canis lupus rufus, [9] [10] or a coywolf (a genetic admixture of wolf and coyote). Because of this, it is sometimes excluded from endangered species lists, despite its critically ...
The wolf's long bones are 10% longer than those of extant European wolves, 12% larger than those of C. l. santenaisiensis and 20% longer than those of C. l. lunellensis. [90] The teeth are robust, the posterior denticules on the lower premolars p2, p3, p4 and upper P2 and P3 are highly developed, and the diameter of the lower carnassial (m1 ...