Types of Crosses
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, in order to achieve offspring with a genetic identity which is closer to that of the parent.
Dihybrid Cross. Definition: A dihybrid cross is a breeding experiment between P generation (parental generation) organisms that differ in two traits. The individuals in this type of cross are homozygous for a specific trait. Traits are characteristics that are determined by segments of DNA called genes.
A monohybrid cross is a type of hybridization experiment between individuals that are homozygous for a trait but have different alleles for that trait.
A test cross can determine whether the individual being tested is homozygous dominant (pure bred) or heterozygous dominant (hybrid). Example: To perform an actual test cross with our black guinea pig, we would need a guinea pig (of the opposite sex) that is homozygous recessive (“bb”).