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Diploid nuclei of the ascomycete Neurospora crassa contain 14 chromosomes.A single diploid cell in an ascus will undergo one round of meiosis,followed in each of the daughter cells by one round of mitosis,producing a total of eight ascospores.
-If a single,diploid G₂ nucleus in an ascus contains 400 nanograms (ng) of DNA,then a single ascospore nucleus of this species should contain how much DNA (ng) ,carried on how many chromosomes?

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The diploid nucleus undergoes meiosis, halving the chromosome number to 7 (haploid), and then mitosis, which does not change the chromosome number but doubles the cell count. The DNA content is also halved during meiosis to 200 ng and remains the same after mitosis, so each ascospore (haploid) has 100 ng of DNA carried on 7 chromosomes.

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