1„Evo-Devo‟ or the study of the evolution of developmentQ. Why study this?A. Development is the process that gives rise to form , and so the evolution of form is brought about through the evolution of development.1.All animals have the same basic genetic „toolkit‟ –the genes responsible for building bodies and body parts are shared by virtually all animalsHumans have just 14 more genes than chimps2. Many animal „toolkit‟ proteins exhibit functionally equivalent activity in vivo when substituted for one anotherHalder et al 1995Observed that mammals and insects, which have evolved separately for more than 500 million years, share the same master control gene for eye morphogenesisSo how does morphological diversity evolve?Consider a species that exists in different forms, the forms can be more distinct in terms of morphology and ecology than the adult forms of any pair of sister speciesDrosophila melanogaster life cycleD. melanogaster D. simulansSo the Drosophila is using the identical set of toolkit proteins to create markedly different body morphologies. Achieved by regulating which genes are expressed and by when, where and how much they‟re expressed.
has intentionally blurred sections.
Sign up to view the full version.