WGU D115 OA STUDY GUIDE UNIT 2 EXAM 2026 | ACTUAL
EXAM QUESTIONS WITH DETAILED ANSWERS WITH
RATIONALES AND A READINESS PRACTICE EXAM TEST
BANK WITH A STUDY GUIDE | LATEST UPDATED AND
VERIFIED FOR GUARANTEED PASS
How is transcription best defined? - CORRECT ANSWER -RNA is synthesized from a DNA
template
Process where the information in a strand of DNA is copied into mRNA
How is translation best defined? - CORRECT ANSWER -Follows transcription
mRNA leaves nucleus and enters cytoplasm
RNA directs the synthesis of a polypeptides for protein synthesis
An amniocentesis indicates a neural tube defect when an increase in which protein is evident? -
CORRECT ANSWER -Alpha fetoprotein
Ex: spina bifida or anencephaly
Amniocentesis is recommended for pregnant women with what history? - CORRECT ANSWER
-Have a family history of genetic disorders
What is the technique for prenatal diagnosis of chromosomal abnormalities at 10-12 weeks
gestation? - CORRECT ANSWER -Chorionic villus sampling CVS
, Amniocentesis during the 15th week of pregnancy
What is the term used for an error in which homologous chromosomes fail to separate during
meiosis or mitosis? - CORRECT ANSWER -Nondisjunction
What is the most common cause of Down Syndrome? - CORRECT ANSWER -Maternal
nondisjunction
embryo now has three copies of chromosome 21
What syndrome, characterized by an absent homologous X chromosome with only a single X
chromosome, exhibits features that include a short statue, widely spaced nipples, and webbed
neck? - CORRECT ANSWER -Turner
A person with 47, XXY karyotype has the genetic disorder resulting in which syndrome? -
CORRECT ANSWER -Klinefelter: males
When a child inherits a disease that is autosomal recessive, it is inherited from whom? -
CORRECT ANSWER -Both parents
In order to have a disorder that is autosomal recessive a pt must inherit two mutated genes, one
from each parent
Cystic fibrosis is caused by what type of gene? - CORRECT ANSWER -Autosomal recessive
The BRCA1 and BRCA2 mutations increase the risk of which cancer in women? - CORRECT
ANSWER -Ovarian, breast, and pancreatic cancers
Prader-Willi syndrome causes a chromosomal defect that is what? - CORRECT ANSWER -
Inherited from the father
EXAM QUESTIONS WITH DETAILED ANSWERS WITH
RATIONALES AND A READINESS PRACTICE EXAM TEST
BANK WITH A STUDY GUIDE | LATEST UPDATED AND
VERIFIED FOR GUARANTEED PASS
How is transcription best defined? - CORRECT ANSWER -RNA is synthesized from a DNA
template
Process where the information in a strand of DNA is copied into mRNA
How is translation best defined? - CORRECT ANSWER -Follows transcription
mRNA leaves nucleus and enters cytoplasm
RNA directs the synthesis of a polypeptides for protein synthesis
An amniocentesis indicates a neural tube defect when an increase in which protein is evident? -
CORRECT ANSWER -Alpha fetoprotein
Ex: spina bifida or anencephaly
Amniocentesis is recommended for pregnant women with what history? - CORRECT ANSWER
-Have a family history of genetic disorders
What is the technique for prenatal diagnosis of chromosomal abnormalities at 10-12 weeks
gestation? - CORRECT ANSWER -Chorionic villus sampling CVS
, Amniocentesis during the 15th week of pregnancy
What is the term used for an error in which homologous chromosomes fail to separate during
meiosis or mitosis? - CORRECT ANSWER -Nondisjunction
What is the most common cause of Down Syndrome? - CORRECT ANSWER -Maternal
nondisjunction
embryo now has three copies of chromosome 21
What syndrome, characterized by an absent homologous X chromosome with only a single X
chromosome, exhibits features that include a short statue, widely spaced nipples, and webbed
neck? - CORRECT ANSWER -Turner
A person with 47, XXY karyotype has the genetic disorder resulting in which syndrome? -
CORRECT ANSWER -Klinefelter: males
When a child inherits a disease that is autosomal recessive, it is inherited from whom? -
CORRECT ANSWER -Both parents
In order to have a disorder that is autosomal recessive a pt must inherit two mutated genes, one
from each parent
Cystic fibrosis is caused by what type of gene? - CORRECT ANSWER -Autosomal recessive
The BRCA1 and BRCA2 mutations increase the risk of which cancer in women? - CORRECT
ANSWER -Ovarian, breast, and pancreatic cancers
Prader-Willi syndrome causes a chromosomal defect that is what? - CORRECT ANSWER -
Inherited from the father
