Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human chromosome arrangement.
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Q12: Down syndrome can be caused by either
Q13: When constructing a karyotype,the chromosome images are
Q14: The risk for Down syndrome increases _.
A)
Q15: Turner syndrome is not associated with intellectual
Q16: If nondisjunction occurs during meiosis I,_.
A) two
Q18: The most common type of polyploidy in
Q19: The risk of having a child with
Q20: Amniocentesis is not performed on mothers over
Q21: In a(n)_ translocation,two nonhomologous chromosomes exchange parts
Q22: Approximately 40% of all children with Down
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