'Mating white' presentation slideshows

Two factors, A/B (mostly basids)

Two factors, A/B (mostly basids). Tetrapolar mating system ? meiosis gives four types of segregants Need different alleles at each mating locus A 1 B 1 :: A 2 B 2 ? A 1 B 1 , A 1 B 2 , A 2 B 1 , A 2 B 2 Schizophyllum has ~28,000 mating type combinations. Basidiomycete mating.

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