Question

Ok, have you had enough questions dealing with polarity in the embryo...No? Well ok, here's another.

Which of the following is not an actual protein or factor involved in the dorsal/ventral axis specification in Drosophila?​

Answer 1

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Believe it or not Easter, sptatzle, and snake are all factors that interact in a chain of events that allow for the activation of the dorsal protein that enters the nucleus of cell and ventralizies it.

It may seem confusing that the dorsal protein actually ventralizes cells; however scientists oftentimes discover what certain proteins do by knocking them out or removing them from cells.

When the dorsal protein was removed from a cell; the cell was completely dorsalized; hence the name dorsal

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Answer 2

The slope of the Dorsal gradient is not determined by diffusion of extracellular.

Genes involved in dorsoventral axis formation in Drosophila.