| 21. | The regulatory gene does not need to be in, adjacent to, or even near the operon to control it.
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| 22. | One may distinguish between " structural " genes encoding enzymes, and regulatory genes encoding proteins that affect gene expression.
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| 23. | Even a small difference in the activity of a high-level regulatory gene could produce significant effects in the developing animal.
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| 24. | In fact, xol-1 is often referred to in the literature as the master sex regulatory gene of C . elegans.
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| 25. | Regulatory genes can also be described as positive or negative regulators, based on the environmental conditions that surround the cell.
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| 26. | Genes that flick on less often, such as interesting regulatory genes, are less likely to be picked up, Venter said.
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| 27. | If, at some point, a cell acquires a mutation that turns off a major regulatory gene, " voil?", cancer.
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| 28. | A small group of regulatory genes in the giraffe appear to be responsible for the animal's stature and associated circulatory adaptations.
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| 29. | Even slight alterations in those regulatory genes can give rise to a wide network of changes in the developmental processes they govern.
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| 30. | People with abnormal iron regulatory genes do not reduce their absorption of iron in response to increased iron levels in the body.
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