Final answer:
Cladistics and phylogenetic trees are used in biology to determine the pattern of shared ancestry among different lineages.
Step-by-step explanation:
The (hypothesized) pattern of shared ancestry among different lineages can be determined using various methods in biology, such as cladistics and phylogenetic trees. Cladistics involves comparing homologous ancestral and derived characteristics to understand the relationships between different groups of organisms. Phylogenetic trees, on the other hand, show the evolutionary relationships and common ancestors of species and taxonomic groups based on physical and genetic evidence.