9-9 Biology - zygospores are released under good...

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4 9-9-10 Biology 7 Fungal life cycle (from slideshow) - opposite mating type fuse - form dikarion (not diploid) - meiosis - mitosis - 8 spores result -deuteromycota – imperfect fungi (no sexual stage) not on test, but on MCAT Fungal Diversity - 1. chytridiomycota o parasitic on organisms eg. Algae, misquito larvae, nematodes o or saprophytic o most live in fresh water, or moist soil o some are unicellular, others form mycelia which are branching chains of cells o only fungi that have flagella at any stage of the life cycle - 2. zygomycota o bread mold o have coenocytic hyphae o reproduce asexually by elongated or by sporangiphores (spores have the same genetic makeup) o sexual phase two hyphae of opposite mating types fuse produce dikaryon a covering is produced called a gametangium. The gametangium thickens to form a zygosporangium inside the zygosporangium (zygosporangium is different from sporangium) fertilization occurs zygospores are produced by meiosis a sporangium eventually sprouts which contains the zygospores
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Unformatted text preview: zygospores are released under good conditions, spores sprout to form new mycelium-3. ascomycota o sac fungi o produce spore filled sacs called asci, spores are called ascospores o two major groups hemiascomycetes many species are unicellular (yeast) reproduce asexually by fission or budding reproduce sexually, two cells of opposite mating types fuse to produce a dikaryon and a zygote this zygote undergoes meiosis and sometimes mitosis to produce ascospore within an ascus Euascomycetes filaments ascomycetes including neurospora, chestnut blight, dutch elm disease, powdery mildews, penicillium reproduce asexually by elongation or by producing conidia (conidia produce conidiospores) reproduce sexually o two mating types fuse o form dikaryic hyphae o at the ends of the hyphae, sacs are produced called asci o fertilization occurs, meiosis and mitosis occur to produce 8 ascospores (all happens inside asci)...
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9-9 Biology - zygospores are released under good...

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