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WGU D115
EXAM STUDY GUIDE
100 QUESTIONS & ANSWERS
LATEST UPDATE 2026/2027
Course Code: WGU D115
Genetics • Immunology • Neurology
Mental Health • Endocrine • Reproductive
Respiratory • Pathophysiology
Exam Review • Practice Questions
WGU D115 Exam Study Guide – 100 Questions &
Answers | Latest Update 2026/2027
pg. 0
, 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
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
1
WGU D115
EXAM STUDY GUIDE
100 QUESTIONS & ANSWERS
LATEST UPDATE 2026/2027
Course Code: WGU D115
Genetics • Immunology • Neurology
Mental Health • Endocrine • Reproductive
Respiratory • Pathophysiology
Exam Review • Practice Questions
WGU D115 Exam Study Guide – 100 Questions &
Answers | Latest Update 2026/2027
pg. 0
, 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
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
1
