Using a genetic diagram, explain the inheritance of CAH, assuming it is an autosomal recessive condition and both parents are carriers.

Here is the genetic diagram for the CAH question, following the style of the image provided:

Parents' phenotypes: Normal (no CAH) $\times$ Normal (no CAH)
Parents' genotypes: $Aa \times Aa$

Gametes:
Parent 1: (A) (a)
Parent 2: (A) (a)

Offspring genotypes (from combining gametes):

$$AA$$ $$Aa$$ $$Aa$$ $$aa$$

Offspring phenotypes:
Normal; Normal; Normal; CAH

Genotypic ratio: $1 AA : 2 Aa : 1 aa$
Phenotypic ratio: $3 \text{ Normal} : 1 \text{ CAH}$
Percentages: $75\% \text{ Normal} : 25\% \text{ CAH}$