Related Clues:

• Future aves?
• 39-Across, to Caesar
• Certain cells
• Eggs, to Caesar
• Fraternal twins come from two different ones
• Some germ cells
• Oocytes, eventually
• "Oh no!"
• 'Doggoneit!'
• "Shucks!"
• Cry created by Schulz
• Eggs (Latin)
• Tells
• Some gametes
• Fertilization targets