Related Clues:

• Eggs' contents
• Things laid by a gallina
• Whites' counterparts
• Breakfast for Brutus?
• Future aves?
• 39-Across, to Caesar
• Yellows
• Certain cells
• Eggs, to Caesar
• Fraternal twins come from two different ones
• Some germ cells
• Oocytes, eventually
• Eggs (Latin)
• Some gametes
• Fertilization targets