Examlex
While four-year-old Andrew is articulate and speaks in complete sentences,he can't tell you anything about when he was under a year old because of:
Common Ancestor
A species or genetic lineage from which two or more descendant species or lineages have evolved.
Transcription Factors
Proteins that help regulate the expression of genes by binding to specific DNA sequences near genes.
Positional Information
The spatial and temporal cues that cells use during development to differentiate into the correct cell types and form complex structures.
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