Guard hair length is positively correlated with guard hair diameter and down fiber length, but negatively correlated with variation in guard hair diameter and down fiber diameter.
4 citations
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October 2003 in “Annales de Génétique” A specific gene mutation causes different hair defects in Indian monilethrix families.
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April 2018 in “Hormones” No consistent link between genotype and phenotype in 5-α-Reductase type 2 deficiency.
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April 2014 in “American Journal of Medical Genetics” Boys with less severe EDA mutations in XLHED have milder symptoms and better sweat and hair production.
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February 2014 in “PloS one” LIPH mutations in Japan cause varying degrees of hair loss and woolly hair.