Since zucchini squash and yellow crookneck squash belong to the same species (Cucurbita pepo), they can be successfully crossed. The result of this cross-pollination is called either a yellow or golden zucchini.
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Marie Notnats enjoys learning about new topics and teaching people new skills. She has been writing professionally since 2008. She is a professional horticulturist with a Bachelor of Science degree in horticulture from Brigham Young University. She writes for About.com, Examiner.com, eHow, and assorted gardening blogs.