How is the Coated Xoloitzcuintli variety genetically characterized regarding the hairless allele?
Answer
Homozygous for the non-hairless allele
The existence of the Coated variety, which possesses a full coat of hair, provides crucial insight into the genetics of the hairless trait. Since the hairless trait is dominant, the Coated variety must carry the recessive gene responsible for coat presence on both alleles. Therefore, the Coated Xoloitzcuintli is characterized as being homozygous for the non-hairless allele. This genetic difference means that even though two Hairless Xolos (who must be heterozygous, carrying one dominant hairless allele and one recessive non-hairless allele) can produce Coated puppies, the Coated dog itself must possess two copies of the recessive allele to completely mask the dominant hairless trait.
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