| 1 | So selection for one variant can have all sorts of seemingly unrelated effects. | |
| 2 | It may be because they possess a certain variant of the CLOCK gene. | |
| 3 | Secondly, there are just too many variants of the theory, any one of which could be correct - and little to choose between them. | |
| 4 | Some of the variants were detectable in subjects' mothers, and so must have been inherited via the egg. | |
| 5 | The speech of an individual, considered as a linguistic pattern unique among speakers of his or her language or dialect. |