Step-by-step explanation:
If an individual is dihybrid for completely linked genes, meaning the two genes are located on the same chromosome and do not undergo crossing over, then only two equally frequent gametes containing only parental allele combinations would be expected. This is because there would be no opportunity for recombination between the two genes during meiosis, so the alleles on each chromosome would remain together and be passed on intact to the gametes.
For example, if the individual is heterozygous for two linked genes, AaBb, and the alleles for A and B are dominant over a and b, respectively, then the two parental allele combinations would be AB and ab. During meiosis, the two chromosomes carrying the A and B alleles would segregate together and form one gamete with AB alleles, while the two chromosomes carrying the a and b alleles would segregate together and form another gamete with ab alleles. These two equally frequent gametes containing only parental allele combinations would be produced in equal numbers.