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Name: Wayne
Status: Other
Grade:  Other
Location: N/A
Country: United States
Date: January 2007

Is there any possibility to birth a child with the YY chromosome? What would it look like, and how would it act?

You would have to inherit an X chromosome along with the two Y chromosomes and you would be a male and taller than average. You would also have severe acne, possibly slightly retarded and a tendency toward criminality. Google XYY syndrome for more information on this condition.

Ron Baker, Ph.D.

A YY chromosome individual would not survive. The Y chromosome is missing too may essential genes to be able to survive without an X chromosome paired with it. The X chromosome contains all the essential genes missing in the Y chromosome.

Males are genetically weaker than females and may explain why males live 6-8 years less on the average than females.

Steve Sample

It is possible for that a zygote (first cell after fertilization, ie. when egg and sperm come together) to inherit 2 Y's. But the X chromosome contains genes on it that are necessary for life other than determining sex, so if there is no X, that is not compatible with life and that zygote would not grow into a baby. In effect it would be "miscarried". The mother probably would never know she had conceived.


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