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Molecular Systematics: opportunities and controversies

Molecular Systematics: opportunities and controversies. Molecular Systematics. Molecular biology has revolutionized the field of systematics Molecular systematics is a powerful new tool. It opens a new different dimension of looking at the field of systematics

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Molecular Systematics: opportunities and controversies

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  1. Molecular Systematics: opportunities and controversies

  2. Molecular Systematics • Molecular biology has revolutionized the field of systematics • Molecular systematics is a powerful new tool. • It opens a new different dimension of looking at the field of systematics • The earliest of molecular systematics was chemotaxonomy (using macro molecules such as seed proteins, polypeptides, carbohydrates, secondary metabolites etc.). However, these have largely been replaced in recent time by DNA/RNA data.

  3. Controversies in Molecular Systematics • Molecules versus morphologies • Types of characters and methods of analysis • Homology and similarity in molecular systematics • Gene trees and organismal phylogeny • Constancy of evolutionary rates • Neutrality of Molecular variants • Data quality and presentation

  4. Pros and Cons using morphology dan DNA in phylogenetic analysis

  5. Pros and Cons using morphology dan DNA in phylogenetic analysis • Genetics • Existence of variation • Cost • Ability to study characters that reflect a variety of different genes • The fossil record • Determination of homology • Convergent evolution • The rate of evolution

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