Araucana here a post that l wrote today in the Araucana thread on this subject!
The lethal gene in araucana kills 100% of the homozygots and almost 20% of the heterozygote this dominant Autosomal gene causes some severe abnormalities in the embryonic development of the head, it couses an incomplete fusion between the hyoid and the mandibular bons, cause a dysfunctional skull and death.
Funny how we like to breed things with health problems.
Almost all pure breed making, needs alot of brothers and sisters mating, fact that diminish the gene pool of the breed, causing alot of problems! In fact there is a therm that describes the vitality of mix breed it called Heterosis.
See the Persian cat, naked cat, gefman Shepherd dog spine, pekinez dogs breathing problems ect.
