which of the following is not an example of genetic variability

1. A population of snails has phenotypes that range from tan to dark brown.

2. An asexually reproducing single celled organism produces 10 offspring in its lifetime.

3. Allele #1 for wing size in a butterfly has the following sequence of bases: GGAT, while Allele #2 has this sequence: GGAC.>

4. A population of squirrel has multiple alleles that code for fur coloration ​