How to use hypermelanistic in a sentence? Find typical usage patterns (collocations)/phrases/context for "hypermelanistic" and check conjugation/comparative form for "hypermelanistic". Mastering all the usages of "hypermelanistic" from sentence examples published by news publications.
The piping guans are a bird genus, Pipile, in the family Cracidae. A recent study (Grau et al. 2005), evaluating mtDNA, osteology and biogeography data (Grau et al., 2005) concluding that the wattled guan belongs in the same genus as these and is a hypermelanistic piping guan.
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The dominant A expresses the underlying tabby pattern, while the recessive non-agouti or "hypermelanistic" allele, a, does not. Solid-color (black or blue) cats have the aa combination, hiding the tabby pattern, although sometimes a suggestion of the underlying pattern can be seen ("ghost striping"). This underlying pattern, whether classic, mackerel, ticked or spotted, is most easily distinguishable under bright light in the early stages of kittenhood and in on the tail in adulthood. However, the agouti gene primarily controls the production of black pigment, so a cat with an O allele for orange color will still express the tabby pattern.
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An Abyssinian kitten displaying the ticked tabby pattern. The Agouti gene, with its dominant A allele and recessive a allele, controls the coding for agouti signaling protein. The wild-type A produces the agouti shift phenomenon, which causes hairs to be banded with black and an orangish/reddish brown, this revealing the underlying tabby pattern (which is determined by the T alleles at the separate tabby gene). The non-agouti or "hypermelanistic" allele, a, does not initiate this shift in the pigmentation pathway and so homozygotes aa have pigment production throughout the entire growth cycle of the hair—along its full length.
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