A major influence on the age of onset of menarche is _____.
A) ethnicity
B) cultural influence
C) genetics
D) vitamin and mineral intake

Question

Quizplus · Accepted Answer

Genetics play a major role in determining the age of onset of menarche (first menstrual cycle). Studies have shown that the heritability of menarcheal age is estimated to be around 50%. Other factors such as ethnicity, cultural influence, and vitamin and mineral intake can also influence menarcheal age, but genetics are the strongest determinant.

A Major Influence on the Age of Onset of Menarche