I too suspect the change in hair characteristics may be genetically based.
Sometime ago I spent a little time trying to track down info on the genetics of
hair but idn't have much success beyond discussion of recessive and dominant
characteristics. Among my daughters, not only does the color change from
platinum to dark blond/light brown, but as they approached puberty their hair
went from straight to extremely wavy/kinked - quite a dramatic transformation.
We know sex hormones affect gene expression but, in my brief search, I didn't
find any data on hair characteristics in particular.
Linda Walsh
University of Northern Iowa
