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Thread: Same DNA Reproduction

  1. #1 Same DNA Reproduction 
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    I was in an argument with a friend who was saying if a hermaphrodite had fully function genitalia of both then they could theoretically impregnate themselves and I was saying they couldn't because the DNA is too similar and it couldn't because the sperm and egg wouldn't see each other as a viable option. Similar to how humans can't mate with other species. Can someone tell me who is closer to the truth and why?


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    Quote Originally Posted by Delor317 View Post
    I was in an argument with a friend who was saying if a hermaphrodite had fully function genitalia of both then they could theoretically impregnate themselves and I was saying they couldn't because the DNA is too similar and it couldn't because the sperm and egg wouldn't see each other as a viable option. Similar to how humans can't mate with other species. Can someone tell me who is closer to the truth and why?
    In higher organisms like humans, a 'fully functional hermaphrodite' seems unlikely to exist due to anatomical constraints. Clearly the anatomies of the two genitalia must occupy the exact same location on and in the body. This would prevent the development of such a human since you could not superimpose both complete sex organs in the same place and expect them to work. It seems like an insurmountable problem.

    The closest you might get is someone with a largely (and fully functional) female anatomy, with testicles for forming functional sperm. The sperm would then have to be extracted and delivered by artificial insemination, or in vitro fertilization. But self-impregnation does not seem feasible based on the anatomical requirements alone.

    However, there should be no problem with forming a zygote and undergo full development since the human egg should recognize any viable human sperm regardless of source and allow fertilization. This would not be a clone of the individual however since the genes of both sperm and egg have undergone genetic recombination during meiosis in order to provide diversity in the next generation. So with the "idealized" hermaphrodite, this unique form of "inbreeding" could be possible, but seems rather unlikely.

    While most animals cannot mate with other species, there are exceptions, such as mules from female horses and male donkeys. Splake are produced from crossing male brook trout and female lake trout. These offspring are sterile. If the offspring are fertile, then the two breeding animals are by definition of the same species, but may be classified as sub-species based on various aspects.

    It remains possible that humans could cross breed with chimpanzees, but no solid proof has yet been provided.

    https://en.wikipedia.org/wiki/Humanzee


    Last edited by Double Helix; August 8th, 2021 at 08:45 PM.
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