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    Ascus normally contains how many numbers of ascospores?
    Question

    Ascus normally contains how many numbers of ascospores?

    A.

    8

    B.

    16

    C.

    4

    D.

    None of the above

    Correct option is A

    The correct answer is: (A) 8
    Explanation:
    An ascus is a sac-like structure found in Ascomycota fungi that contains ascospores (reproductive spores). Normally, an ascus produces 8 ascospores as a result of meiosis followed by mitosis:
    • A diploid nucleus (2n) undergoes meiosis, forming 4 haploid nuclei.

    • Each of these 4 haploid nuclei undergoes mitotic division, resulting in 8 ascospores inside the ascus.

    • This is a characteristic feature of sac fungi (Ascomycetes), such as yeast, Penicillium, and Aspergillus.

    Information Booster:
    • The number of ascospores in an ascus can vary but is most commonly 8.

    • Examples of Ascomycetes fungi: Yeast (Saccharomyces cerevisiae), Morels (Morchella), Truffles (Tuber), and Neurospora (Neurospora crassa).

    • The ascus is a defining feature of Ascomycota fungi, making them distinct from other fungal groups like Basidiomycota (mushrooms).

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