Boa Constrictor morph
Boa Constrictor (Boa constrictor)
Visual Sharp Albino. Homozygous at Sharp Albino locus. Orange and yellow saddle pattern on white background with pink to red eyes. Visually similar to Kahl Albino but genetically distinct. Confirmed at a separate locus by complementation testing. Some Sharp lines show a subtle lavender or pearlescent cast in the white areas.
The Sharp Albino locus is one of three confirmed independent albino loci in Boa constrictor. Like Kahl Albino, homozygous Sharp Albino animals are amelanistic. They lack melanin and display an orange/yellow-on-white pattern with pink to red eyes. While visually similar to Kahl Albino, Sharp Albino animals are produced from a genetically distinct locus confirmed through complementation testing: crossing Sharp x Kahl produces phenotypically normal double-het offspring. Some breeders report subtle visual differences between Sharp and Kahl lines (Sharp animals from certain lineages show a more lavender, pearlescent, or "Sharp trait" undertone in the white areas, though this varies significantly by line and individual). Sharp Albino is less common in the market than Kahl Albino but maintains dedicated breeding programs. The Sharp x Sharp cross produces visual albinos at the expected 25% ratio. Sharp Albino can be combined with Kahl Albino genetics to produce "double het" animals that are normal-appearing, which is an important distinction breeders must track carefully.
How to identify it: Sharp Albino (sharp/sharp): Orange and yellow pattern on a white to off-white background with pink to red eyes. Visually very similar to Kahl Albino. Some Sharp lines show a slight lavender or pearlescent cast in the white/cream areas that can suggest strain identity, but this is variable and not diagnostic. Definitive strain identification requires known parentage or complementation breeding (crossing to a known-visual Kahl Albino. If offspring are normal-looking, the Sharp animal is confirmed at a separate locus). Heterozygous carriers (het Sharp) appear phenotypically normal.
Sharp Albino follows a recessive inheritance pattern, carried on the Sharp Albino allele (locus SharpAlb).
Because Sharp Albino is recessive, an animal needs two copies of the allele to show the trait visually. An animal with a single copy is called het sharp albino (heterozygous). A het animal looks normal but carries the gene, so pairing two het sharp albino animals produces, on average, one in four visual sharp albino offspring.
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