Relate & Review- "My Inner Fish"

 In the episode of "Your Inner Fish," Dr. Neal Shubin talks about how many of the features we inherit are from fish, especially our embyronic structure. Some questions that interested me is what the Sonic hedgehog gene responsible for, which is to tell cells in a particular order due to the signals and generating multiple digits. The Sonic hedgehog gene helps form the multiple digits along the hand.  It is located in the embroyo and comes in when interaction of proteins lay down a basic pattern. It can be increased where it can form more than 5 finger digits like Kamani, and can decrease. Another interesting question is what did Tikataalik use its' neck for in the water, which is to watch out for other predators, and hunt smaller prey. Tiktaalik are the first transitional fish to live underwater and go onto land. They are tetrapod primitive fish that descends from pioneer amphibians. These concepts relate  to knowing the structure and defining characteristics of fish and how there structures are very similar to humans, mainly in the Chordates Part 1 and 2 Vodcast.