On self-pollinating the F1 tall plants, the short plants in F2 are about:

1. The F1 plants were all tall, but they carried both traits. 2. The F2 progeny of the F1 tall plants are not all tall; one quarter of them are short. 3. So both tallness and shortness were inherited, but only tallness was expressed. _Source: syllabus Science, Ch 9 'Heredity and Evolution'_