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**"Hairy" is expressed for 90 minutes at a time, and 12 cycles of 90 minutes each are required to make a somite.
 
**"Hairy" is expressed for 90 minutes at a time, and 12 cycles of 90 minutes each are required to make a somite.
 
**Somites are named beginning with the most newly formed somite. Therefore, the greater the number of the somite, the older the and closer to the anterior of the embryo it is.
 
**Somites are named beginning with the most newly formed somite. Therefore, the greater the number of the somite, the older the and closer to the anterior of the embryo it is.
**As cycle one of somite one ends, cycle one of simte two begins; one somite forms every minute.
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**As cycle one of somite one ends, cycle one of somite two begins; one somite forms every minute.
    
==Somite Maturation==
 
==Somite Maturation==
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