Advantages And Disadvantages Of Atavism

Atavism- Are traits of ancestors that have been inhabited in the modern day. For traits to be an atavism, an organism 's parents or recent ancestors can 't have the trait. They are a good support to the evidence of evolution due to many reasons. Firstly, traits appear that had disappeared generations before. They Can occur in several ways likes when genes for formerly existing phenotypical features are conserved in DNA, and then these become expressed through a mutation that either knock out the overriding genes for the new traits or make the old traits override the new one. The Genes do not determine what the organism is, but with atavism, they can sometimes serve as reminders of our evolutionary past. However, there are disadvantages to atavism …show more content…
All living things share A DNA sequence. The significance of this is that the similarity between certain DNAs are too great to think its just a coincidence meaning they must all come from a common ancestor. All living organisms seems to have a Common DNA and be built around a common structure with differences between that are small yet distinct enough to define species. Information found within DNAs come out extremely accurate and does not relate to appearance or adaptations. DNA sequences and hox genes are at the very root of its physical being and is the most reliable evidence to trace a common ancestor. They compliment other types of evidences including vestigial organs (organs that were once functional in our evolutionary past) and comparative embryology how different types of organisms compare to one another during their fetal stages) DNA sequences can be used to estimate the time when two species branched off, filling in the gaps of some fossil records as well. However, some disadvantages include, might not detect some silent mutations in the protein sequence and Incorrect results due to cross …show more content…
Yes, atavism and fossils do suggest theories of evolution and how we have come from one organism however they are subjective and have many faults. DNA is accurate and scientifically proven and testable. It proves that all organisms share a common structure meaning we come from a common ancestor as well as giving more thorough understanding of organisms evolved from one organism while branching off other pieces of evidence like vestigial organs. They all however show that evolution is a good scientific theory as each explores how we come from similar organisms and can help explain evolutionary