Bio Do Now Get out natural selection lab Question: What are things your would look for to tell if two people were related?

Evidence for evolution Anatomical Evidence Similar structures Use of fossil record Genetic Evidence Similar DNA sequences, genes, chromosomes, amino acid sequences, protein sequences

Homologous structures Features with same basic structure, same relationship to other features, and same development Why might this indicate a shared relationship?

Analogous structures different structures with the same function, evolved separately

Vestigial structures remnants of organs or structures that were important in ancestors, but not as important now

Question Why are the wings of insects and birds analogous and not homologous? What would you need to know to determine if two structures are homologous or analogous?

Embryology Guess the embryo game Embryos have similar features- the more similar their development, the more closely related they are Guess the embryo game

Fossil Record Remains or impressions of extinct animals Study of fossils = paleontology The position and location of fossils helps us to understand patterns of organisms from ages past Some transitional fossils may show relationships between types of species.