Multiple types of families are seen in Mary Shelley's Frankenstein. First, Victor's family (before Elizabeth moves in) is a nuclear family. A nuclear family consists of parents and their children. After Elizabeth moves in, the family becomes an adoptive family. Extending this family structure more, once Caroline passes away, the Frankenstein family becomes a single-parent family (same type of family seen in the De Laceys). The De Lacey family eventually becomes a cross-generational family (one can assume) because Felix and Sophie will never leave his sister and father on their own.