In horses, black coat (B) is dominant over brown coat (b) , and being a trotter (T) is dominant over being a pacer (t) . A black horse who is a pacer is crossed with a brown horse who is a trotter. The offspring is a brown pacer. What is the genotype of the brown trotter parent?

A) BBTT
B) BbTt
C) Bbtt
D) bbTt
E) bbtt

Learning Objectives

• Acquire an understanding of the notions of dominant and recessive alleles and their resultant phenotypic manifestations.
• Understand the importance of homozygous and heterozygous genotypes within the study of genetics.
• Implement the tenets of Mendelian genetics for predicting the outcomes in monohybrid and dihybrid crosses.