Question

using your knowledge of genetics, study the pedigree. how certainly does this pedigree rule out the possibility that the woolly hair trait is recessive? for instance, if the woolly hair trait were autosomal recessive, then each affected individual would have to be homozygous. answer the question: is there any instance in this pedigree?

Answer 1

No there is no chance that an affected individual could not possibly be homozygous and thus the disease may be autosomal recessive.

The majority of cases of keratoderma with woolly hair are inherited in an autosomal recessive manner, meaning that each cell's two copies of the affected gene are mutated. Woolly Hair is a rare congenital abnormality of the scalp hair that affects non-black people and manifests as tightly coiled hair in a specific area of the scalp or covering the entire side. Woolly hair that is isolated or localised is typically benign and unrelated to other conditions or complications.

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