In Neurospora, the white-spore allele (ws) results in white spores rather than the wild-type black spores. Diploid ws / ws+ cells undergo meiosis followed by one round of mitosis to form ordered tetrads. Indicate if the pattern of spores seen in the tetrads are consistent with first-division or second-division segregation.
-ws; ws; ws; ws; ws^{+; ws+; ws+; ws+}

Question

Quizplus · Accepted Answer

First-division segregation results in tetrads with two parental and two recombinant spores. In this case, the tetrads have two ws spores and two ws+ spores, which is consistent with first-division segregation.

In Neurospora, the White-Spore Allele (Ws) Results in White Spores