Anonymous
Anonymous asked in Science & MathematicsBiology · 2 months ago

LOGIC :If we share a huge amt of DNA with a non-human and we are different...what does that mean?

it MUST mean that DNA doesn't account for everything. That just follows logically

15 Answers

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  • Anonymous
    1 month ago

    It means that DNA does a lot of things that we still do not understand. Genes are known to code for structural proteins and enzymes. Many of the same proteins are found in many different organisms. For example, the protein collagen is part of the skin of humans and other vertebrates. Yet it can be found in sponges, one of the most primitive animals, and one that last shared a common ancestor with all other animals more than 600 million years ago. So, the gene that codes for collagen is shared by a lot of different organisms. There are lots of different enzymes and structural proteins that many organisms share, and that is why so many organisms share the same DNA. 

    Of course the collagen in sponges are arranged differently than the collagen in our skin or the collagen in the dorsal fin of whales and dolphins (the dorsal fin of whales and dolphins contain no bone, and the only reason they can stand upright is because the collagen is strong enough to hold it up vertically). That means even the same protein can be used to make very different kinds body parts of animals. These proteins are simply raw materials. They are not the reason different organisms look different. It is how the raw materials are used, based on different blueprints, that is the reason why a frog looks like a frog but a sponge looks like a sponge. 

    So, the logical conclusion is that DNA that codes for the same building blocks for the body are the same in many different organisms. In fact, many proteins can be found in plants, animals, fungi and bacteria and the genes that code for them are therefore the same in all these organisms. OTOH, how those building block materials are used to construct the different organisms and their different parts can be quite different. For example, cellulose can be used to build a tree trunk or a leave.  These instructions are found in developmental genes in animals. Very few developmental genes are needed to construct an animal or a plant. That is why even though many organisms look so different, they do not have vastly different DNAs. They share a lot of genes that code for the same building blocks, and yet their own unique versions of developmental genes are the reason they can be constructed to be so different. It is similar to how cars are built. Cars are basically made of the same building block material of steel, other metals and plastics. Yet because of the different blueprints, the final product can be as different as a sports car or a station wagon or a pickup truck. 

  • 1 month ago

    A big proportion of our DNA is junk DNA (it means it apparently has no function and doesn't code for proteins or RNA). The so called housekeeping genes are highly conserved from bacteria to man because they're involved in essential biological functions that occur in all living beings (maintenance of central metabolism and cell structure, DNA replication, gene-to-protein translation...).

    We are not *that* different. Look at your skeleton, muscles... they are surprisingly similar to those of other animals (especially mammals, but also birds and reptiles that diverged from our lineage +300 million years ago).

    Differences are mostly in terms of size and shape. Yes, humans have longer limbs than dogs because we walk upright, while a dog's jaw muscles are much more powerful than ours.

  • garry
    Lv 6
    2 months ago

    it means were an animal , you fool .. humans are the highest form of animals .

  • D g
    Lv 7
    2 months ago

    It means as others say just a small amount can make a big difference 

    The reason we share alot is that most bodily functions are similar such as lungs or heart only the development of brain is much different that is for those that use them

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  • 2 months ago

    It takes only relatively small amount of DNA to create large differences.  Most organisms share about half their DNA in common, and that shared half is devoted to what are sometimes called "housekeeping functions" such as aerobic metabolism. Sometimes a mutation in a single gene can create a new species.  (Humans have about 20,000 genes.)

  • CRR
    Lv 7
    2 months ago

    It could mean that the difference lies in the DNA that is different, or that there is biological information outside the DNA.

    The similarities in DNA could be due to a common ancestor, or a common designer.

    BTW although you might hear that we are 99% similar to Chimpanzees that was derived 50 years ago using what was by today's standards a very crude method. Latest results suggest we are less than 90% similar.

    Source(s): Latest results suggest we are less than 90% similar to Chimps
  • 2 months ago

    "Different" isn't a binary either/or yes/no state. It's a spectrum. One of the greatest scientific success stories of the last century has been the confirmation that the level of phenotypic similarity between any two organisms correlates very very well with the level of genetic similarity. In other words, if we share 99% of our DNA, we look and work very very similar, while if we share 80% or 50%, the level of similarity drops proportionately.

    This is an independent confirmation of the theory of evolution, and data from THOUSANDS and THOUSANDS of comparisons have all confirmed the theory, making evolution the most heavily supported scientific theory of all time.

  • Cowboy
    Lv 6
    2 months ago

    It means that we're ALL genetically-based organisms dependent on cellular health and reproduction. Making and maintaining cells is something that takes up a lot of DNA in every living thing on earth.

  • Anonymous
    2 months ago

    It suggests that we share distant ancestry with this non-human, and that mutations (and shuffling of DNA by sexual reproduction) have happened

  • Ted K
    Lv 7
    2 months ago

    The simplest answer to your question is that the kinds of differences between organisms you're talking about are not so much due to differences in DNA (sequence), because there are significant sequence similarities between animals from fish all the way to humans.  Rather, the key is in how those sequences are used--when and where they're used during development (i.e. so-called spatiotemporal variations in gene expression), and how expression of one set of structural genes influences subsequent expression of other sets of structural genes.  These groups of sequences can be thought of as akin to Lego blocks, which can be assembled in various ways to generate various body plans--e.g. development of fish fins are coded and controlled in a similar manner as that of our limbs.. 

    And the instructions for how to put those Lego blocks together come from yet other networks of not structrural, but regulatory genes, whose varying spatiotemporal expression determines when and where the structural genes will be expressed.

    If you have any interest in going beyond mere "logic," in favor of learning some actual facts, then I recommend this book: "Endless Forms Most Beautiful: The Science of Evo Devo," by Sean B. Carroll.

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