The yeast Saccharomyces cerevisiae is a simple single celled eukaryote with both a diploid and haploid mode of existence. The mating of yeast only occurs between haploids, which can be either the a or α (alpha) mating type and thus display simple sexual differentiation. Mating type is determined by a single locus, MAT, which in turn governs the sexual behaviour of both haploid and diploid cells. Through a form of genetic recombination, haploid yeast can switch mating type as often as every cell cycle.
Read more about Mating Of Yeast: Mating Type and The Life Cycle of Saccharomyces Cerevisiae, Mating Type Switching
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—D.H. (David Herbert)
“The far-off clinching and mating of arches, the leap and thrust of the stone, carrying a great roof overhead, awed and silenced her.”
—D.H. (David Herbert)
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—Bible: New Testament, 1 Corinthians 5:6.