Complex sentence: The conclusion from this was that the ear mutation is due to a simple dominant gene; if one parent provides the gene for straight ears, and one parent provides the gene for folded ears, the kittens will be Folds.
Split into simpler sentences: The conclusion from this was that the ear mutation is due to a simple dominant gene. If one parent with the gene for straight ears, and one parent with the gene for folded ears, the kittens will be folds.