g phase

G1 phase

Cell Biology.
the first growth period of the cell cycle, during interphase, in which the cell grows and cytoplasmic organelles are replicated.

Origin:
G abbreviation for growth

Dictionary.com Unabridged

G2 phase

Cell Biology.
the second growth period of the cell cycle, following DNA replication and preceding prophase, during which the cell forms the materials that make up the spindle.

Origin:
1970–75; G abbreviation for growth

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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