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.

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Molecular Biology: Genetics

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Discussion[edit]

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'?