This entry will once again focus on deception from the Discovery Institute.
Darwin's Homology Problem?
In this video, DI tries to make the case against evolution by stating that homology doesn't always indicate common ancestry. Of course it doesn't, Richard Dawkins discussed this in his book The Blind Watchmaker over ten years ago. His answer was that biochemical and genetic similarity must be present, not just physical similarity.
They begin by talking about the Australian wolf. It has a lot in common with North American wolves, yet no one thinks the two share a recent common ancestor. Is this a problem for evolution? No. DNA Tests have confirmed Australian Wolves to be more closely related to their fellow Marsupials rather than Placental Wolves.
They continue to illustrate their point using the Wasp and the Fruit Fly. They tell us that different genes are responsible for forming the body segments of each one. I suspect that this is not true, however. Proceedings of the National Academy of Science published a paper that stated that the genes responsible for development ("homeobox" genes) were very similar between the honey bee and the fruit fly. The honey bee belongs to the Order Hymenoptera as does the wasp.
They go on to discuss how the gut develops from different tissues in the Lamprey, the shark, and the frog. Talk.Origins provides the answer on this one:
"We now know that organs can be stimulated to grow in many parts of the body (such as eyes growing on a fly's wings) simply by ensuring that the proper signalling chemicals are present. Thus homologous organs arising from different areas may result simply from mutations in where signalling proteins are expressed."
In another video they drag up the ancient issue of Haeckel and his infamous embryo sketches. I do not think that these embryos are used in many textbooks nowadays. For one thing, I examined my brother's textbook and found only correct drawings of embryos. For another, Randy Olson, in his film "Flock of Dodos", showed that textbooks simply do not use these embryos any more. For a third, Kenneth Miller corrected the fake embryo drawings in his textbook nearly ten years ago.
UPDATE: I have posted an update to this clarifying some of what I stated, and responding to a comment left about this entry.