Download Fish and Humans: Homologus Structure

Fish and Humans: Homologus Structure
by Barry Wright
Essay: Fish and Humans: Homologus Structure
Pages: 10
Rating: 3 stars
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Humans and fish are not closely related on the outside appearance. Most people would not see how we can share
the same features with fish, but scientists do know that these two species share homologous features.
Homologous is being in similar structures, and having similar genes indicate species are from a common ancestor,
but does not have indicated that these features will work exactly the same. Humans and fish are related in the
lineage of chordate because human shared homologous features to fish. Homologous features shared by human
and fish enlighten the evolutionary pathway from the earliest vertebrate by sharing similar structures of the hands
and fins, the development of teeth that diversified into features that showed up from the skin, and down to the
instruction that made us who we are. The similarity of the bone structures and genetic instruction are modification
we have from the original of fish’s bone and gene.
The similarity of the bones of the humans’ hands and bones in fish’s fins is the homologous structure. The hands
that we use to help us grab, grasp, and grip onto things are important to us as humans. Without these hands we
would not be able to use tools and hold pencils. Shubin pointed out that the hands of the cadavers are the
signature that we are what we are because our hands speak of many tasks that we are capable of doing such as
building, holding, and creating our reality (Shubin, p.29). The structures of the hands are thought by anatomists
such as Sir Charles Bell and Sir Richard Owen because the design was profound. Bell thought that it was the
perfect design that only god could create such a thing. Owen started to notice a pattern because he had a wider
range of experiences with creatures ranging from...