The farmer realizes he could sell mini-dragons as pets, but doesn't want them to breathe fire, because that would be dangerous. Suggest two parental genotypes for parents that would produce mini, non-fire breathing dragons.

ddff  and DDFf

Explanation:

From the information given:

Let DD represents the dwarf traits and FF represents the ability for the dragons to breathe fire.

Also, if dd represents the normal traits and ff represents the inability of the dragons to breathe fire.

Then; we can cross a dominant trait for dwarfism which has a heterozygous trait for fire with a recessive trait of normal and nonfire.

The two parental gametes are: ddff  and DDFf

Using a Punnet Square:

         DF              Df

df      DdFf           Ddff

df      DdFf           Ddff

From above; we could observe that the proportion of progenitors that will be dwarf and at the same time unable to breathe fire is 50%.

the answers are a and c