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Compatibility and Sterility Questions

Question 1

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Answer 1

Recognition factors are released constitutively by one mating type and received by a second. Different alleles are necessary at one (bipolar) or two (tetrapolar) loci, though the remaining genotypes may be identical.


Question 2

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Answer 2

The fungus releases both the plus and minus mating type hormones, and it has the receptors for both hormones. It thus establishes a sexual state with itself. It can also mate with isolates of both mating types, each of which may release a single recognition factor.


Question 3

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Answer 3

Tetrapolar fungi have two loci at which different alleles are required to ensure complete interaction. If the alleles at one locus are the same, then either lack of development or formation of clamp may ensue. Generally, the result of these interactions do not survive for long. Fusion may occur, but the resultant combined cell is unlikely to proliferate, or the nucleus will not divide and pass through the mycelium.


Question 4

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Answer 4



Question 5

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Answer 5



Question 6

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Answer 6



Question 7

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Answer 7