| 41. | In fact, no one has the faintest notion what causes the initial genetic changes to occur.
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| 42. | The " factory " dies with the cell, so the patient experiences no permanent genetic change.
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| 43. | Cancer cells undergo genetic changes that occur progressively.
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| 44. | Scientists introduced a genetic change that crippled an enzyme involved in correcting errors in protein formation.
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| 45. | They were then brought back to the lab, mated and their progeny examined for genetic changes.
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| 46. | Rays from the sun can cause genetic changes in the skin that can lead to skin cancer.
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| 47. | Plants and animals will be grown through several generations and then analyzed for genetic changes, Morrison said.
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| 48. | That did not change, Forrest said, until molecular biologists showed smoking caused genetic changes in the lung.
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| 49. | Since genetic change cannot spread through a population so quickly, researchers believe environmental change may be responsible.
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| 50. | Reznick said such small genetic changes were to be expected in view of the short time frame.
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