Is Patau's Syndrome (Trismoy 13) a dominate or recessive trait?
Patau is not caused by gene mutation. It is a nondisjunction disorder in
which the 13 th chromosome pair doesn't separate from each other in meiosis.
This causes a sex cell (gamete) to have 2 number 13 chromosomes when it
should only have 1. So is this were an egg cell for instance, when it was
fertilized by a sperm carrying a 13th chromosome, the resulting cell will
have 3 number 13 chromosomes instead of the normal 2. The word trisomy means
to have 3 chromosomes in a "pair" . So it is not dominant or recessive. It
is from having too much information, not the wrong kind of information.
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Update: June 2012