Bumwill
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| When a baby is being made, chromosomes (X and Y) decide if it will be a boy or a girl. Two X Chromosomes make a girl, and an X and a Y make a boy. I'm fascinated to know if it would be possible to get two Y chromosomes to make something (no Xs), and what sort of creation would that make? |
andlabs
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| Posted on 07-30-13 05:50:35 PM (last edited by andlabs at 07-30-13 05:51:28 PM) |
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Not naturally. The egg cell will always have an X chromosome, as it comes from the female. The egg cell has mechanisms to prevent more than one sperm from infusing its genes into the egg, so it will always meet either an X chromosome or a Y chromosome; which one depends on which the sperm cell has.
Though artificial insemination might make this theoretically possible, you will need to ask a reproductive biologist. |
Cuber456
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I don't think that it is possible in nature to have a being with two Y chromosomes. A female will always have XX and a male will (most often) have XY. Reproductively speaking, a male and female can throw their genes at each other all day and you won't get a YY combination. I did meager research (aka I used wikipedia) and it is apparently possible to have males with a combination of XXY ot XYY. However, it appears you can never get a female with a Y chromosome, which again leads to the fact that you would always have one X chromosome in a newborn.
I am certainly not a biologist so take what I said skeptically and/or do your own research.
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