Final answer:
A new gene grouping different from the parental types is known as nonparental (recombinant) type progeny, resulting from homologous recombination and leading to a different allele combination in the offspring.
Step-by-step explanation:
A new grouping of genes or a new combination of characters which is different from the parental types is called nonparental (recombinant) type progeny. This phenomenon occurs from homologous recombination during meiosis, resulting in offspring that exhibit a different allele combination compared with its parents. Contrastingly, parental types are progeny which possess the same allelic combination as their parents. Recombination can create diversity in a species and is important for evolution. It can occur between genes that are linked on the same chromosome or between nonhomologous chromosomes when portions of DNA are exchanged. Recombination frequency is the average number of crossovers between two alleles, observed as the number of nonparental types in a population of progeny.