Hello,
I'd like to ask whether the yolk of a chicken egg is the actual haploid cell or is the haploid cell included in the yolk?

Thank you

The yolk is the food source for the growing haploid cell.

Nice site with clear illustration of the yolk and the cell the embryo grows from (blastoderm) but to be clear the embryo (9) is slightly separate from the yolk (8).
http://web.mac.com/lubap/Eggs/Anatomy_f … -m.svg.png

Nice site here
http://www.geochembio.com/biology/organisms/chicken/

See this detailed article for more information
http://www.ncbi.nlm.nih.gov/books/NBK10070/

Best,
Al

"Hope is a duty from which palaeontologists are exempt."
David Quammen