25. Figure 24.15 One mechanism for allopolyploid speciation in plants
26. Fig. 24-UN2 Ancestral species: Triticum monococcum (2 n = 14) AA BB Wild Triticum (2 n = 14) Product: AA BB DD T. aestivum (bread wheat) (2 n = 42) Wild T. tauschii (2 n = 14) DD
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30. Fig. 24-13 EUROPE Fire-bellied toad range Hybrid zone Yellow-bellied toad range Yellow-bellied toad, Bombina variegata Fire-bellied toad, Bombina bombina Allele frequency (log scale) Distance from hybrid zone center (km) 40 30 20 20 10 10 0 0.01 0.1 0.5 0.9 0.99
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32. Fig. 24-15 Sympatric male pied flycatcher Allopatric male pied flycatcher Pied flycatchers Collared flycatchers Number of females (none) Females mating with males from: Own species Other species Sympatric males Own species Other species Allopatric males 0 4 8 12 16 20 24 28
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34. Fig. 24-16 Pundamilia nyererei Pundamilia pundamilia Pundamilia “turbid water,” hybrid offspring from a location with turbid water
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36. Fig. 24-14-4 Gene flow Population (five individuals are shown) Barrier to gene flow Isolated population diverges Hybrid zone Hybrid Possible outcomes: Reinforcement OR OR Fusion Stability