Final answer:
Notes explaining gene choices are documented in the Gene Candidates field during genome annotations, providing important insights into the annotator's reasoning.
Step-by-step explanation:
When annotating genomes, notes explaining choices for gene functions and annotations are important for capturing the reasoning behind the decisions made by the annotator. These notes typically go into the Gene Candidates field within the annotation software or database being used. It's a specific area designated for researchers and students to document their evidence and logic for the gene annotations they propose, which later can be used for review or as a reference.