YY is not possible in isolation because you need at least an X chromosome to survive as stated above, however! this article is about someone with extreme mosaicism, meaning that some of his cells don’t have the same chromosomes as the rest of his body, so some of his cells are YY but other parts of his body have X chromosomes so it’s still survivable overall
Wow, so kinda like chimerism? Though this is on another level. Couldn’t find a wiki page but definitely would like to read about it. By the way, while searching for this, I found about XXYY which I also didn’t know about.
YY is not possible in isolation because you need at least an X chromosome to survive as stated above, however! this article is about someone with extreme mosaicism, meaning that some of his cells don’t have the same chromosomes as the rest of his body, so some of his cells are YY but other parts of his body have X chromosomes so it’s still survivable overall
Wow, so kinda like chimerism? Though this is on another level. Couldn’t find a wiki page but definitely would like to read about it. By the way, while searching for this, I found about XXYY which I also didn’t know about.
Monotremes possess 5X and Ys, but their system is more related to birds and reptiles ZW,