1 Severe chronic tailbone pain and Arm pain (2 causes). 2  Severe chronic tailbone pain and Arm pain in children (2 causes). 3  Severe chronic tailbone pain and Back paralysis (2 causes). 4  Severe chronic tailbone pain and Behind knee pain (2 causes).
Best Answer: Curly hair is dominant and straight hair is recessive. Wavy hair IS a result of incomplete dominance. You could have super curly hair even if both your parents have wavy hair. Wavy hair is actually incomplete dominant. If you do the Punnett Square method it will show that to be true. Curly hair is dominant and straight is homozygous recessive. Thus producing a wavy haired child. Two parent with wavy hair should produce a wavy haired child because of the phenotype wavy was produced.
Hormones are a possible trigger for the curly hair gene. As well as affecting the quality of your hair, hormones can change your muscle tone too. This includes your scalp. The change of muscle tone could affect the shape of your hair follicles and their direction of growth. Straight hair follicles grow straight out but curly hair follicles have a hook shape. With my hair, puberty was the when my curls decided to appear and this fits with the hormone changes. For many women, pregnancy and birth have a significant impact on their hair too.