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?

Question

Quizplus · Accepted Answer

In meiosis, the number of chromosomes is halved, so each of the four ascospores will have 7 chromosomes. In mitosis, the amount of DNA is halved, so each of the four ascospores will have 100 ng of DNA.

Diploid Nuclei of the Ascomycete Neurospora Crassa Contain 14 Chromosomes