BIOA01H3 Chapter Notes -Protein Structure, Molecular Clock, Mosaic Evolution
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BIOA01H3 Full Course Notes
Verified Note
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Document Summary
Determining evolutionary relationships btw organisms and deciding if similar structures or similar-looking structures are grounds for grouping species together. Similarity(resemblance) in appearance does not always mean relatedness. Biologists classify (and name) organisms based on features: morphological traits, chromosomal anatomy, gene sequences, physiological functioning, morphology of sub-cellular structures and behaviour patterns. Systematics : analytical approach for studying the diversity of life and evolutionary relationships identify, describe, classify and name organisms based on evolutionary relationships. Two goals of systematic: reconstruct phylogeny and taxonomy. Phylogeny: evolutionary history of a group of organisms: phylogenetic tree. Formal hypotheses identifying likely relationships among species. Allows us to distinguish similarities inherited from a common ancestor from those that evolved independently in response to similar environments. Gynogenetic: the process whereby a sperm fertilizes an ovum, but does not contribute genetic material to the resultant zygote. Androgynous: partly male and partly female in appearance; of indeterminate sex: having the physical characteristics of both sexes; hermaphrodite.
