Summary
Combinations of A, B and C class genes specify sepals, petals, stamens and carpels.
In depth
A alone gives sepals; A+B petals; B+C stamens; C alone carpels. Mutants such as apetala2 in Arabidopsis have altered organ identity. E-class genes (SEPALLATA) are also needed.
The model explains floral whorls, with A and C genes mutually inhibitory. In A mutants, C expands into outer whorls. Many species show variations such as modified B genes producing tepals.
Example: in Arabidopsis ap3 and pi mutants lack petals and stamens.
Frequently asked questions
What is Floral Development ABC Model?
Combinations of A, B and C class genes specify sepals, petals, stamens and carpels.
Which area of biology covers Floral Development ABC Model, and how advanced is it?
Floral Development ABC Model is one of the 56 topics in Plant Biology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Flowers, Stems, Crop Domestication.
Can you give an example of Floral Development ABC Model?
Double flowers in roses have stamens converted to petals.
What should I learn before Floral Development ABC Model?
Work through the Beginner topics in Plant Biology first, such as Plant Kingdom, Photosynthesis, Chlorophyll, then return to Floral Development ABC Model. Advanced topics assume the Intermediate vocabulary.
What topics are related to Floral Development ABC Model?
The closest topics to Floral Development ABC Model are Flowers, Stems, Crop Domestication, Double Fertilisation. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Floral Development ABC Model?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Floral Development ABC Model. To practise the whole of Plant Biology, use the Plant Biology quiz.
How is Floral Development ABC Model different from Flowers?
Floral Development ABC Model: Combinations of A, B and C class genes specify sepals, petals, stamens and carpels. Flowers: Reproductive structures of angiosperms containing sepals, petals, stamens and carpels. Read both side by side and note what each one explains.
How should I study Floral Development ABC Model step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Flowers and explain the difference aloud. Finally, take the Plant Biology quiz and come back to this page for any question you miss.