Stages of a Neurospora cross Sexual spores grow to adults Asci Meiosis 1 Synchronous division and fusion + to form diploid meiocytes Cross- fertilization Maternal nucleus Mating type A Maternal nucleus Mating type a wo mutants are FIGURE 3-9 The lfe cycle of Neurospora crassa, the orange bread mold. Self-fertilization is not possible in this species: there are two mating types, determined by the alleles A and a of one gene, and either can act as "female." An asexual spore from the opposite mating type fuses with a receptive hair, and a nucleus from the asexual spore trav- els down the hair to pair with a female nucleus in the knot of cells. The A and a d types will be pair then undergo synchronous mitoses, finally fusing to form diploid meiocytes.

Stages of a Neurospora cross Sexual spores grow to adults Asci Meiosis 1 Synchronous division and fusion + to form diploid meiocytes Cross- fertilization Maternal nucleus Mating type A Maternal nucleus Mating type a wo mutants are FIGURE 3-9 The lfe cycle of Neurospora crassa, the orange bread mold. Self-fertilization is not possible in this species: there are two mating types, determined by the alleles A and a of one gene, and either can act as "female." An asexual spore from the opposite mating type fuses with a receptive hair, and a nucleus from the asexual spore trav- els down the hair to pair with a female nucleus in the knot of cells. The A and a d types will be pair then undergo synchronous mitoses, finally fusing to form diploid meiocytes.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter23: Protists

Section: Chapter Questions

Problem 13RQ: Alternation of generations describes which of the following? The haploid form can be multicellular;...

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