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How is transcription best defined? - ✔✔RNA is synthesized from a DNA template.
An amniocentesis indicates a neural tube defect when an increase in which protein is
evident? - ✔✔Alpha fetoprotein
Amniocentesis is recommended for pregnant with what history? - ✔✔Have a family
history of genetic disorders
35 or older positive prenatal screening test chromosomal condition or
neural tube defect in a previous pregnancy abnormal ultrasound
results
What is the technique for prenatal diagnosis of chromosomal abnormalities at 10 to 12
weeks' gestation? - ✔✔Chorionic villus sampling
*Amniocentesis is usually performed during the 15th week of pregnancy or later.
What is the term for an error in which homologous chromosomes fail to separate during
meiosis or mitosis? - ✔✔Nondisjunction
, WGU D115 Exam Study Guide,100, Questions with
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What is the most common cause of Down syndrome? - ✔✔Maternal nondisjunction What
syndrome, characterized by an absent homologous X chromosome with only a single X
chromosome, exhibits features that include a short stature, widely spaced nipples, and
webbed neck? - ✔✔Turner Syndrome
A person with 47, XXY karyotype has the genetic disorder resulting in which syndrome? -
✔✔Klinefelter Syndrome
When a child inherits a disease that is autosomal recessive, it is inherited from whom? -
✔✔Both Parents
Cystic fibrosis is caused by what type of gene? - ✔✔autosomal recessive
The BRCA1 and BRCA2 mutations increase the risk of which cancer in women? -
✔✔ovarian
Prader-Willi syndrome causes a chromosomal defect that is what? - ✔✔inherited from the
father
Which type of immunity is produced by an individual after either natural exposure to the
antigen or after immunization against the antigen? - ✔✔Active-Acquired