I. Tracing Back Family Tree : Here is a movie shows tracing back from a grandson to his grandfather. Developmentally, are there any similarities or differences between the two of them?

II. Tracing Back Cell Lineage : Where are cells in adult worms from? A movie with C. elegans cell lineage tracing back gives you the opportunity to observe the origin of intestine cells.

III. Observation & Questions : Here are more questions to get you thinking about human family tree and C. elegans cell lineage.