What are the reproductive modes of 050 yeast? 2009-5-2 1 The reproductive modes of yeast can be divided into two categories: asexual reproduction and sexual reproduction. Asexual reproduction includes budding, fission and budding. Sexual reproduction mode: ascospores. 1, budding: budding is the main way for yeast to reproduce asexually when the environment is superior. Mature yeast cells first grow a small bud, which grows to a certain extent and continues to grow away from the mother cell, and then forms a new individual. There are multilateral buds, two ends buds, and three sides buds. 2, fission: a few kinds of yeast, like bacteria, reproduce by cell transverse division. 3. Bud splitting: The mother cell always shoots at one end and forms a diaphragm at the bud base, and the daughter cell is bottle-shaped. 4, sexual reproduction: this is a way of division when conditions are not good. The specific process is that two adjacent yeast cells each extend a tubular protuberant, then contact and fuse with each other, and form a channel, in which two nuclei combine to form a diploid nucleus, and then undergo meiosis to form four or eight nuclei. Each daughter nucleus and its surrounding protoplasm form spores, that is, ascospores, which are contained in the sacs evolved from yeast cell walls and eventually develop into yeast individuals.