1 Temperate highland tropical climate with dry winters (Cwb, Cwc) is a type of climate characteristic of the highlands inside the tropics of Mexico, Peru, Bolivia, Madagascar, Zambia, Zimbabwe and South Africa, but it is also found in central Argentina, outside the tropics.
Like the earwax glands, the mammary glands are also a form of the apocrine gland and express the ABCC11 gene. The C variant of ABCC11 associated with wet type earwax is also associated with colostrum secretion from the mammary glands (4).
Earwax, also known as cerumen, is a mixture of dead skin cells and lipid secretion from the apocrine gland in the ear canal. There are two types of earwax: wet and dry. These types may be the result of climate adaptation and are associated with risks for certain diseases and different responses to medications. Earwax type is determined by a variation in the ABCC11 gene (1).