I believe the answer is different versions of a gene :)
It circulates the air using a fan. A regular oven merely surrounds the food with hot air. The heat is distributed differently.
Hope that helped you.
During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells. Then in anaphase II, the chromosomes separate at the centromeres. The spindle fibers pull the separated chromosomes toward each pole of the cell.
Na: positive; OH: negative
