Which Statement Regarding Partial Chromosomal Deletions or Duplications Is True

question 9

Multiple Choice

Which statement regarding partial chromosomal deletions or duplications is true?

• A)They result in either a triple dose of some gene alleles or a single dose of some alleles.
• B)They usually result in fewer or milder manifestations than do trisomies or monosomies.
• C)The majority of partial chromosomal deletions or duplications result from advanced parental age.
• D)General prenatal chromosomal analysis has resulted in fewer children being born with these problems.