Rhagoletis pomonella Native to North America Males hang around fruit and mate with females Females oviposit eggs on hawthorne fruit Larvae grow up on fruit spoiling it 1 2 Liger male lion with female tiger Mule male donkey female horse Hinny female donkey male horse 3 4 Zebroid female horse male zebra 5 6 7 9 8 Knowlton et al 1993 Divergence in proteins mitochondrial DNA and reproductive compatibility across the Isthmus of Panama Science 260 1629 1632 10 Dodd 1989 Reproductive isolation after divergence Dodd 1989 Female Grew four populations of fruit flies on starch based food Male Starch Maltose Starch 22 9 Maltose 8 20 Grew four populations on maltose based medium After letting the populations reproduce independently for some time he found detectable genetic differences using starch gel electrophoresis Female Control Male 11 Starch same Starch diff 18 15 12 15 Starch same Starch diff 12 About 100 years ago Rhagoletis started to lay eggs on apples and also on cherries pears and roses Now is a major agricultural pest Rhagoletis pomonella Native to North America Males hang around fruit and mate with females Females oviposit eggs on hawthorne fruit Larvae grow up on fruit spoiling it 13 Assortative mating hawthorn males mate with hawthorn females apple males mate with apple females The two races apple hawthorn are genetically different from gel electrophoresis Developmental time is different too 40 vs 60 days for hawthorn maggots 14 Evolutionary trends in Lepidolina The increase in the diameter of the prolocus initial chamber of the fusulinid foraminiferan Lepidolina multiseptata Evolution of the Eocene primate Pelycodus and Notharctus 15 Rhizosolenia planktonic diatom 17 16 18 Metrabdotos bryozoan
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