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tomsecret
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also what is an example of an organism inferred to have evolved from igonamy to anisogamy besides sperm and egg? is yeast an example of this??
Isogamous reproduction is when two gametes of equal size and shape fuse together to form a zygote. Anisogamous reproduction, on the other hand, is when two gametes of different sizes and shapes fuse together to form a zygote. In yeast, sexual reproduction can be either isogamous or anisogamous depending on the species.
In yeast, sexual reproduction occurs through the process of mating. Haploid cells of opposite mating types, usually referred to as "a" and "alpha", come together and fuse to form a diploid zygote. The zygote then undergoes meiosis to produce haploid spores, which can then grow and reproduce asexually.
Sexual reproduction in yeast allows for genetic diversity through the mixing of genetic material from two individuals. This can increase the chances of survival in changing environments and can also help eliminate harmful mutations from the gene pool.
Yes, yeast can also reproduce asexually through a process called budding. In this process, a small bud forms on the parent cell and eventually separates to form a new individual. This type of reproduction is advantageous in stable environments where there is no need for genetic diversity.
In addition to sexual and asexual reproduction, yeast can also undergo parasexual reproduction. This involves the exchange of genetic material between haploid cells through a process called "conjugation". However, this type of reproduction is not as common in yeast as sexual and asexual reproduction.