Mom's genotype is Hh and Dad's hair isn't
brown. Brown hair is dominant to red hair. Use the letter h for hair. What are the probabilities and
ratio for their offspring? (some info is missing)

Ok so imma make this cleaner to make it earlier to understand. :)
H for brown hair
h for red hair

Mother: Hh
(It’s given)
Father: hh
(Saying that it’s isn’t brown; let’s put this instead, we are trying to find the gene for red hair.)

So in the punnet square below, it is shown that there is a 50/50 chance for the offspring to have red hair.
Ration is 1:1.
But there is also another probability for the offspring to be like their mother, have the dominant gene of black hair overruling the recessive gene of red hair.

Ao, bo, ab, bahope these