Question 4
Parental Genotypes:
Homozygous Black Pacer = BBtt
Homozygous Chestnut Trotter = bbTT
The homozygous black pacer offers the following alleles in all of its gametes: Bt
The homozygous chestnut trotter offers the following alleles in all of its gametes: bT
Therefore all of the offspring from this cross will have the following genotype: BbTt, which means they will all be black trotters.