I asked Sandy this exact question the other day. She said the strongest genetic is the plain pink. So if you had a seedpod from a plain pink they will prob all be pink. There is a small chance that your pink plant might have been the result of a seed from a seedpod from a a different colour plant (a white for example) and so by genetic background you may get some white flowered seedlings. Also If you had a seedpod from a purple or a red then some seedlings may be purple or red but the majority would still be pink. She said in some cases though she has got a seed pod from a yellow and all have turned out pink :/ Hope that made sense. :P Sarah

The foliage color is genetic -- they are either green leaved or bronze-leaved -- BUT, the culture and care influence the intensity of the color a lot. The more sun they get, the more color in the leaves. Shade makes them a lot less vibrant. Also, if they are grown slightly dry, they tend to have more intense foliage color, but you don't want to stress them so much they don't grow and bloom well.

Yes, you can propagate this branch and likely get what you see since it appears to me to be a mutation. My 'Cooperi' hibiscus occasionally sports an all green branch in the middle of an otherwise beautifully variegated plant.

The inheritance of color in flowers is a large field, especially, as it varies in different species. Color can be either dominant, recessive, or additive in nature, in different species, and in some plant species it can be a combination of these factors. Also some plants have two or more different genetic defects to make them white or non-colored. Orchids form at least two types of whites which when selfed give all white seedlings, but when crossed with each other, give all colored ones. Clivia similarly have two types of yellow forms which when crossed give all reds or oranges. As to Four-O-Clocks (Mirabilis multiflora), it is interesting that Mendel did experiments with this plant along with his better known work with garden peas. Four-O-Clocks show an additive effect with red color for instance. If a red is crossed with a white, all seedlings are pink. Crossing these pinks with themselves, gives white, pink, and red in ratio 1:2:1. For some of the other colors, yellow is dominant over white always. Yellow crossed white gives all yellow. Selfing these gives white and yellow in ratio 1:3. Color patterns like stripes are other genes seperate from color. Try to do a google search probably on flower color genetics as a broad topic. Sticking just to Four-O-Clocks will likely give too few results, and most of the general stuff applies in some way like the expected ratios and such, Hope this helps. George