My Inner Fish Blog Post

The video "My Inner Fish" reveals evidences of the evolution from fish to humans. Through analysis and comparison of different organisms' structures,  the paleontologists display the structures that us humans have in common with our distant ancestor, fish. Some of the similar structures are that we both have are backbones and same nerves. Another evidence is how fish embryos resemble human embryos in the early stage. The similarity in the embryos proves that reptiles mammals, amphibians are all descendants of fish. It also shows that as the offspring develops in an embryo, genes responsible for turning on traits will make us produce structures different than those of reptiles, amphibans, and fish. In addition to those evidence, it also can be seen that human's testicles were in the same place as the fish, which shows how our structures evolved from fish. There is also evidence that the digits of our hands evolved from the bones in fish's fin. This shows where and how our fingers develop. Through years of study of the evolution, scientists have also found genes that are responsible for producing several traits. One of them being them being the Sonic Hedgehog gene, which generates the pattern of digits. The increase in this gene is the reason why mutations occur, giving people 6 fingers instead of 5. Another gene is the EDA gene, which controls how many teeth we have and how our skin develops. Without this gene, our skin would not function properly and would lead to development of certain disorders. In conclusion, there are many evidence proving our evolution from fish.