Simplify the following text for a Grade 6 native English-speaking person.
Original: 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 .
Simplified: They thought that this meant that the ear mutation is from a simple dominant gene . If one parent has the gene for straight ears , and one parent has the gene for folded ears , the kittens will be Folds .