4Ps Two species, the Ribbiting Blue frog and the Croaking Grey frog, live in different river systems. Hundreds of SNPs d

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4ps Two Species The Ribbiting Blue Frog And The Croaking Grey Frog Live In Different River Systems Hundreds Of Snps D 1 (65.02 KiB) Viewed 15 times

4Ps Two species, the Ribbiting Blue frog and the Croaking Grey frog, live in different river systems. Hundreds of SNPs differentiate these species throughout their genome. Humans introduced both species into one pond many years ago, it now has blue frogs, grey frogs, and intermediate phenotypes. You sequence samples of all types of frogs from this pond, and find intermediate frogs have SNPs of both species. Surprisingly, you also find some grey frog SNPs in what look like blue frogs, and some blue frog SNPs in what look like grey frogs. You conclude: there is insufficient information to determine how these species evolved both of the above ele hybrids have backcrossed with both parent species, allowing introgression to occur these sympatric species likely evolved because sexual selection acted on ribbiting versus croaking, leading to assortative mating blue and grey frogs formed allopatically and do not show pre-zygotic isolation