Easier way is to remember that the first number stands for mineralocorticoids and the second number stands for the sex hormones. Think of number one as an arrow pointing up (as in increased).I MISS being 21, when I was WASTED and having LOTS OF SEX.
MISS 21 - WASTED, LOTS OF SEX
Deficient 21 hydroxylase -> Salt wasting (lack of mineralocorticoids (aldosterone)), Excess Sex hormones (precocious puberty/virilization)
17 y/o's are SALTY b/c they're TOO YOUNG FOR SEX
Deficient 17 hydroxylase --> Excess mineralocorticoids (salty), no sex hormones (too young for sex)
Lacking cortisol in all.