Final answer:
Parental offspring are those that display the same combination of alleles as their parents, due to the inheritance of genes without recombination.
Step-by-step explanation:
Offspring that display the same combination of alleles that were found in the chromosomes of their parents are called parental offspring. These offspring have inherited genetic material that is identical to that of their parents for the traits in question. According to genetic principles laid out by Gregor Mendel, the gametic chromosomes combine during fertilization, leading to offspring with the same chromosome number as their parents. The concept was further studied by researchers such as Thomas Hunt Morgan, who found that while linkage of genes often causes offspring to inherit parental types, recombination can also occur during meiosis, leading to nonparental types with new allele combinations. However, in cases where there is no recombination, the offspring exhibit the same allelic combinations as their parents, and these are the parental types.