What did you think about the reading?
The reading was even more interesting than the first one, even though it seemed to have less anecdotes and primarily related other scientist’s results. It allowed me to put my embryology knowledge to use far earlier than I thought I would otherwise have encountered anything related to it.
What did you learn?
I learned about how even something as small as a tooth, or even a single gene can play such a large role in discovering the origins of life. The portion about teeth was interesting because it seems like something you would not really look at too critically when trying to find out about an organism. However, this chapter revealed that teeth are the basis of a lot of research. His expedition where he fund tritheledonts showed that mainly mammals had any sort of occlusion because its illustration was very mouselike. The fact that most animals do not have interlocking teeth is not very easily noticed so seeing it as only mammals was interesting. Perhaps the most informative part was the chapter comparing embryos. I finally properly understood Hox genes, learned that even sea anemones have genes comparable to humans and learned a lot about the different controlling Genes and areas in an embryo.
What questions do you still have?
Now that scientists know which genes control the development of what part of animal, have they discovered what exactly the genes do to control it?