49 thoughts on “Evolutionary Development: Chicken Teeth – Crash Course Biology #17”


  2. This is helpful, i will use this information for synthetic life (synthetic biology) purposes (creating species, how i wanted)

  3. I wonder how are humans gonna use that knowledge… Get us razor sharp teeth? Cat eyes? Would love that

  4. I actually saw a cat with six legs. Some mutation caused it to grow an extra pair of forelegs out of its shoulders, making the legs appear even though they were not active.

  5. Thanks,, really hope I do well on my test. I’ll make sure to mention posterior mice eyeballs on fruit flies👁🐁🍑

  6. Appears the Hox genes are acting as a bidirectional chemical neural network that have learnt through evolution.

  7. Those explanations aren' t satisfactory answers to get clear concepts about human presence on earth and life processes. Here we miss more than 99% of the total history implied in the development of life. Anyway, thank you.

  8. So we could totally make super babies already if it wasn't illegal right? give them 4 arms, a tail, maybe wings. If its already possible I bet someone has done it somewhere.

  9. As someone in CS, evo-devo makes me very happy! It's kind of like computation is the last major paradigm shift in human understanding. After that, understanding new things becomes a recursive call to that paradigm itself.

  10. Homeotic genes also known a homebox genes are not the same as HOX genes as u stated at 2:54. They are different.
    A homeobox is a sequence of DNA within a gene. The protein that results from the gene will will include a small number of amino acids that are dictated by the homeobox sequence. This part of the protein is known as the homeobox domain (or just homeodomain).

    The importance of the homeodomain is that this is the part of a protein that can interact directly with DNA (or RNA). So, proteins that contain a homeodomain can act as transcription factors. Equivalently, genes that contain a homeobox sequence can be regulatory genes.

    Hox genes are simply one group of genes that contain a homeobox sequence, and which are very important in body plan development. However, there are plenty of other genes that are not hox genes and also contain a homeobox sequence.

  11. Those who want to be scientists to blow things up in a laboratory setting, are in fact enemies of science and should stay as far from it as possible.

  12. I'm not studying any of this for uni and have legitimately no reason for watching this. But god damn it was fascinating.

  13. and its all random …. the name implies that you manipulate genes not that naturally occurring species develop into the perfect beings that they are today

  14. developmental regulatory genes: they activate genes that put body parts together.
    gap genes tell blastula if to make anus or mouth.
    homeobox genes (HOX) set up how an animals body is organized, don't actually give instructions to create. HOX genes create masterplan, don't do construction

  15. In short, it was money well spent to studying fruit flys. I remember when there were people against it. If you want science, leave it to scientist not the people who don't understand it.

  16. There was another crash course video that said we can alter our genetic cells through diet etc. It went on to say that this could be passed down but I don't understand how these could be passed down in women since we make our eggs early in development. Anyone have any idea on how that would happen?

  17. it's dads who do things you never thank him for. its the sperm that carries the epigenetics or genetic switches or Gene expression . even in daughters they show more of their fathers spacial information. shape of head. shoulders leg and arm bones. . the father's gene expression mite even prepare defects on the mothers side . though if she has a longer or more intact structure then the fathers his expression may still turn on more of his

  18. its the dads who do things you never thank him for .its sperm that carries the epi gentics I notice even daughters show the spacial I formation. shape of head shoulder leg and arm bone

  19. The point that the mouse version of the “make-an-eye-here” gene works for flies is amazing. That means that this is a gene that has been in the DNA of these animals’ ancestors, unchanged, since at least as far back as when they had a common ancestor, which is at least (guesstimating here) 300+ million years ago. The fact that it’s the same gene is amazing evidence FOR what creationists deny as “macro evolution”. It makes it obvious that flies and mice have a common ancestor.

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