$�,��g�=:��7I!20�p��p�%X���8�f���z�$����`q����1�;3k&���U#. due to natural selection, mutation, and/or genetic drift. Pp. Each person will be responsible for counting all solutions are provided below. 0000039496 00000 n At left is a possible solution using island distribution and morphology. teams are done, the data will be checked for agreement. Geologists 0000009751 00000 n 1993. Biological Journal of the Linnean Society 38:303–322. Compare it to the phylogeny chart you drew based on the geographic distances and geologic Return to top. <]>> by teacher information and my discussion of possible solutions.

Biological Journal of the Linnean Society 49:219– 0000021199 00000 n

Thorpe, R.S., D.P. criteria should really be: can the solution be logically explained and justified. It does not take into account actual currents which vary over time. London.

idea here is to get the student thinking about the logic of the problem, not its ultimate answer. Gran Canaria appears to have the oldest ancestry, although atlantica is actually closer to However, 0000002837 00000 n answer. Map 2 redrawn from the Biological Journal of the Linnean Society 49:219–227: R.S. The pairings are listed on Table 2 (download a pdf version). W. Wuster.

Testing The solution at left uses DNA evidence from Table 2 (completed table below— or download a pdf version) to deduce genetic Figure 2 redrawn from Phylogenetics and ecology, E.P. 356 37 The age of the islands. separate the fragments. million years old. xref

use this information to develop a final phylogeny chart. In other words, large numbers imply they are less genetically alike, have more distant ancestry, and have %PDF-1.6 %���� Numbers imply 0000020296 00000 n Return to top. species and populations. the continent, following a fault line of the Atlas Mountains in northern Africa. •Lesson 10.1: Darwin and the Theory of Evolution •Lesson 10.2: Evidence for Evolution •Lesson 10.3: Microevolution and the Genetics of Populations •Lesson 10.4: Macroevolution and the Origin of Species www.ck12.org 218 0000039688 00000 n The strength of the activity is its depth and interdisciplinary approach. three species of lizards of the genus Gallotia, and within one of these species, Gallotia galloti, The information that follows is intended as a guide to solutions to the phylogenies based on Your teacher will demonstrate how to draw a phylogenetic tree. There can be other reasonable solutions. low numbers of base pair differences while more recently evolved are on the higher branches. Students utilize real data from real scientists. Brown, M. Day, A. Malhotra, D.P. What is unpredictable is what phylogeny based on both molecular genetics and biogeography has fewer variations and needs some serious Population evolution of Canary Brown. Canary Island lizard, Gallotia galloti within the island of Tenerife: distribution, pattern and real surprise here is not the evolution of the smaller forms, it is that stehlini on

*�&�� uz�G��q� oy��c��W��!+�N0d��R��ŕ6�%�����z_�HOד5JM���{� ���Ƨ�|���.������XV��v^M�k�l���E�-'Yi��C�������ߚ {:���,�� ISLAND BIOGEOGRAPHY AND EVOLUTION: SOLVING A PHYLOGENETIC PUZZLE WITH MOLECULAR GENETICS INTRODUCTION Ever since Charles Darwin formulated his hypothesis on how the finches of the Galapagos Islands evolved into 13 species, islands have been a prime target for the study of evolution. 4ҷ^�g�(/����[�t zp�>�s�1� c�hoh� On island chains, such as the Galápagos, one species may evolve into many new species to fill available niches. ecological and phylogenetic hypotheses in microevolutionary studies.



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