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Unformatted text preview: Carpels (Collectively called a pistil but that term is not used in this class) The carpels are the female reproductive structures or gynoecium (modified megasporphylls folded lengthwise) A carpel consists of: A stigma, the receptive surface A style, the stalk that elevates the stigma An ovary, which contains one or more ovules, the megasporangia Flower parts are genetically determined by pattern identity genes that are similar to the homeotic genes that determine pattern and placement in animals. Combinations of three genes are important in flower part determination. Botanists take advantage of this in horticulture to make showier flowers, by converting numbers of stamens into petals, for example....
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- Fall '09