Practice Quiz for Overview of Human Chromosomal Abnormalities

No. of Questions= 5
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1 The likelihood of a child being born with a major genetic defect, such as mental retardation, can often be detected by sampling:
a)  the mother's uterus cells
b)  cells from the embryo or fetus
c)  the father's blood cells
2 Which of the following can be detected now by examining a karyotype?
a) over 3,000 genetic defects
b) an unborn child's gender or sex
c) both of the above
3 If there is a family history of genetic disorders, knowing the gender of an unborn child can be important because:
a) male children are more likely to have autosomal defects show up in their phenotypes
b) female children are more likely to have autosomal defects show up in their phenotypes
c) male children are more likely to have X-linked traits show up in their phenotype
d) A and C
4 Most genetic disorders are due to:
a) gross chromosomal abnormalities such as irregular shapes or numbers of chromosomes
b) the gender of an individual
c) neither of the above
5 Which of the following statements is true regarding karyotype analysis?
a) It is rarely done on the cells of unborn children because it cannot detect most genetic disorders.
b) It is now an important medical tool used in predicting the likelihood that an unborn child will be normal.
c) It is not done any more because human pregnancy has only a small risk of birth defects.



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