Erect ears are dominant over droopy ears,short hair is dominant over long hair,being able to bark is dominant over not barking.

Question

Trihyibrid  square cross two dog are both heterozygous 

Answer 1

            EARS:        + means erect   - means droopy

            HAIR :         + means short     - means long   <--- seems backwards; oh well

            BARKING CAPABILITY:    + means yes   - means no

 

                        +         -

 

            +         +          +

 

            -           +          -

 

So in the heterozygous case:  there is 1/4 chance of the offspring containing purely the dominant trait (dominant homozygous),

                                                          1/4 chance of the offspring containing purely the recessive trait (recessive homozygous),

                                                          1/2 chance of having the dominant trait but carrying the recessive (heterozygous)