1. Heterothallic strains of different mating type can conjugate to form zygospores . 2. Their zygospores are smooth, and borne on apposed, appendaged suspensors. 3. The result of karyogamy is a diploid cell called a zygote or zygospore . 4. The data from this cross provided supporting evidence for meiosis during zygospore development. 5. Therefore, zygospores are the result of sexual reproduction. 6. Where observed, the sexual spores ( zygospores ) are globose and unornamented. 7. Zygospores produced by the fungus have irregular surface crevices.8. Upon germination, a zygospore produces colonies that are genetically different from either parent. 9. Meiosis occurs within the " zygospore " ( see article Phycomyces ). 10. Zygospore formation may be stimulated at higher temperatures of incubation ( 30 40 �C ).
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