Name: Kris Gruca
If a chromosome has two Y's in it what would the child be?
If your question is what would a child be if the fertilized ovum
has 2 y chromosomes in it.....
The only way this could happen would be if the maternal parent
contributed no sex chromosome and the ovum was fertilized by
either 2 sperm cells (providing 2 y chromosomes) or a single
mal-formed sperm cell possessing 2 y chromosomes (each should
only possess a single sex chromosome.) You can see that in any of the
above events, natural abortion would likely quickly occur...
another consideration is that those genes normally present for
fetal development on the x chromosome would be lacking in such
a case . Normally each individual has at least one x chromosome.
Scientists are currently mapping genes on the chromosomes and
it will not be long before we have a clear picture of what is
provided by the entire x or y chromosome (apart from the
fairly well-understood sex characteristics) You can see that a
fetus lacking any of the x chromosome's genetic material would
fail in development and probably be quickly spontaneously aborted.
I am not sure of the exact statistics, but I recall hearing that
a fairly large percentage of conceptions fail and are
naturally aborted due to genetic errors (either errors in the
production of sperm or egg cells, or in the normal fertilization
process.) The likelihood of natural spontaneous abortion would
depend on how essential for development the particular genetic
material is. My suspicion is that a theoretical case like
your question first is very unlikely, and second, would not
provide enough genetic material to develop very far before
the organism would 'run out of blueprints' for development.
Hope this info. helps!
p.s. Thanks for using NEWTON!
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Update: June 2012