Is a Chicken Egg Just One Enormous Cell?

Don’t know where this one came from, but I gots ta know.

Ask A Scientist

Not the whole egg, but the yolk, before fertilization, is a single cell. The white and the various membranes within the shell are not part of the cell.

There is a small area on the surface of the yolk that contains the cell cytoplasm, nucleus, and other cellular components. The rest of the cell is filled with yolk material.