Clonal development builds a group through successive divisions of founding biological cells, rather than by gathering previously separate lineages. In snowflake yeast, daughter biological cells remain attached after budding. Common ancestry does not imply that every descendant remains genetically identical forever: new mutations can arise. See the 2015 study cited under multicellular organism.
Snowflake yeast are cluster-forming Saccharomyces cerevisiae with branching connections between mothers and attached daughter biological cells. They provide an experimental system for studying early transitions to simple multicellular organisms; see the protocol, observations and limits under multicellular organism.
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