Mating type

Mating can take place only between individuals of opposite mating types due to the interaction of cell surface components.
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cerevisiae haploid cells can be of one of two mating types, Roman a or Greek a. Roman haploids secrete a pheromone that in Greek haploids stimulates processes that lead to mating.
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Mating type
In many species of microorganisms individuals can be divided into two types. Mating can take place only between individuals of opposite mating types due to the interaction of cell surface components.
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and
mating types
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Gaia hypothesis
: A hypothesis developed by Lovelock, Watson,
Margulis
and others. In its form, -based on a mathematical model- this theory proposes that t ...
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exposed some of the conidia of one mating type of Neurospora to ultraviolet rays in order to induce mutations.
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These loci are the so-called silent mating type loci (HML and HMR), the rDNA (encoding ribosomal RNA), and the sub-telomeric regions. Reporter genes inserted at any of these loci are not transcribed as well.
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These critters have numerous mating types. There can be very complicated compatability of mating types.
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When mycelia of different mating types meet, they produce two multinucleate ball-shaped cells, which form a mating bridge. The result is that nuclei move from one mycelium into the other, forming a heterokaryon (meaning different nuclei).
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zygospore In fungi, a structure that forms from the diploid zygote created by the fusion of haploid hyphae of different mating types. After a period of dormancy, the zygospore forms sporangia, where meiosis occurs and spores form.
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heterogamy - state of having gametes of different sizes produced by different mating types or sexes.
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Homothallism
A process occurring in some yeasts and other fungal strains where haploid spores formed during meiosis undergo self-diploidization due to the switching of mating type by some of the progeny of the spore.
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Yeast cells come in two mating types and then cells are normally dividing. But if they come in the vicinity of one another, they each emit hormones that arrest the division of the other cell.
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