| We have studied different aspects of DNA sequence polymorphism within a single deme drawn from a population that has experienced a range expansion. |
| If some or all of the samples come from the same deme, the PRF results must be corrected for the effect of drift and migration within demes. |
| A single population may include more than one deme and demes may be partially isolated from one another. |
| For convenience, we henceforth drop the superscripts and subscripts indicating deme identities. |
| So in the summer of 431, a Spartan army invaded Attica, laying waste to Acharnai, a rural deme to the north-west of Athens, within sight of the city walls. |
| But the government of the ward did not possess the solid attributes of that of the Attic deme. |
