In a dihybrid cross, which involves two pairs of contrasting traits, the genotype in the bottom right-hand corner (red square) is expected to be a combination of the homozygous recessive alleles for both traits. This means that the genotype in the red square will be aaBb (where "aa" represents the homozygous recessive genotype for the first trait and "Bb" represents the heterozygous genotype for the second trait).
