Allele: Alternative form of a single gene in a locus. Recessive Allele: Allele whose phenotypic effect is not expressed in the presence of its alternative allele. Dominant Allese: Allele in which phenotypic effect is expressed in heterozygotes. Back Cross: Cross between F1 offspring with P1.

Continue reading about Allele, Recessive allele, Dominant allele, Back cross