lecture_23_creationism

lecture_23_creationism - Howdonovelformsevolvewhile

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
How do novel forms evolve while avoiding harmful pleiotropic eFects? Carroll 2005
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Evolu9on of Gene Expression: Cis vs. trans CIS: changes in cis-regulatory elements lead to novel expression pattern TRANS: changes in protein structure lead to changes in where downstream gene is expressed
Background image of page 2
Evolu9on of Gene Expression: Cis vs. trans -studies to date suggest that more changes between species are cis-regulatory -consistent with idea that pleiotropy constrains structural evolution
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Protein Evolu9on can s9ll be important, especially for genes with minimal pleiotropy Hoekstra et al, 2006 -changes in Mc1R PROTEIN SEQUENCE common source of color evolution in mammals
Background image of page 4
Evolutionary processes and large-scale evolution •Natural selection, genetic drift, mutation, migration sources of MICROEVOLUTION, but can these processes explain taxonomic diversification (MACROEVOLUTION)? • left nagging doubts for early researchers studying evolution vs.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Nagging Doubts by Early Researchers 1) How and why do organisms diverge and diversify? 2) How can we explain patterns of variation across species? 3) Can the evolutionary processes of mutation, selection, drift explain how we got millions of diverse species on earth?
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 29

lecture_23_creationism - Howdonovelformsevolvewhile

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online