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Anonymous asked in Pregnancy & ParentingPregnancy · 1 decade ago

Is it possible to have a "yy" baby?

i was in health class and we were talking about how a boy is xx and a girl is xy. And I was wondering if its possible to have a baby with two y's. And if so, what would it be, boy or girl?

5 Answers

  • Dolyn
    Lv 6
    1 decade ago
    Favorite Answer

    To answer your question, no. You cannot simply have a yy child. At least 1 X chromosome is required to create a viable fetus. There are actually important functions on the X chromosome, where as they have found only a few actual genes on the Y (more or less the genes that turn on and off testosterone production during pivotal developmental times).

    However, you can have a baby with just 1 X. She would have a condition known as Turner Syndrome. You can also have a baby with 3 X's, and it't not problem at all. Also, you can have a baby that is XXY, and he would have a condition known as Kleinfelter Syndrome and would have some female characteristics. You can even have a baby with XYY and some studies suggest those children are more aggressive (I don't believe that though).

    The point is there MUST be at least 1 X to produce a viable fetus, bare minimum. So, YY could never happen.

    Source(s): I'm a Biologist (molecular genetics).
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  • 1 decade ago

    Impossible. There will always be an x chromosome because that is what the mother provides - it's the only thing she CAN provide. A father can provide an x or y. So the only options are xx or xy.

    If two men could somehow reproduce, that would be the only way to get a yy. But sperm don't bind with other sperm, so it can't happen.

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  • Diet C
    Lv 7
    1 decade ago

    Girls are xx boys are xy.

    Women only carry x chromosomes, so it's not possible.

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  • 1 decade ago

    ... no.

    Girls are XX

    Boys are XY

    In order to be YY

    you would need two parents with Y genes.

    and since males cannot reproduce together, this is genetically impossible.

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  • Anonymous
    1 decade ago

    i don't know im going to look that up that is very interesting

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