Talk:Spatiotemporal gene expression

A fact from Spatiotemporal gene expression appeared on Wikipedia's Main Page in the Did you know column on 17 May 2005. The text of the entry was as follows:

Did you know... that spatiotemporal gene expression refers to the patterns in which genes are expressed in different tissues as an organism develops?

A record of the entry may be seen at Wikipedia:Recent additions/2005/May.

Wikipedia

Molecular Biology: Genetics

	This article is within the scope of WikiProject Molecular Biology, a collaborative effort to improve the coverage of Molecular Biology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Molecular BiologyWikipedia:WikiProject Molecular BiologyTemplate:WikiProject Molecular BiologyMolecular Biology articles
???	This article has not yet received a rating on the importance scale.
	This article is supported by the Genetics task force (assessed as Mid-importance).

Time Low‑importance

	This article is within the scope of WikiProject Time, a collaborative effort to improve the coverage of Time on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.TimeWikipedia:WikiProject TimeTemplate:WikiProject TimeTime articles
Low	This article has been rated as Low-importance on the project's importance scale.

WikiProject Time assessment rating comment

Want to help write or improve articles about Time? Join WikiProject Time or visit the Time Portal for a list of articles that need improving.
—Yamara ✉ 19:32, 17 March 2008 (UTC)[reply]

Discussion

Interesting article - don't understand a word of it! But, this is really out of my league. This seems like such a nice topic, but its also filled with a lot of jargon. I hope I'm not being overyl critical. I'm a mathematician - I understand fully that one needs to start at the beginning to get anywhere. One sentence that stuck out:

"The spatiotemporal expression pattern of a particular gene can be identified by placing a reporter gene under the downstream control of the promoter of said gene."

What is meant by 'donwstream control'?