WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM 2024-2025 COMPLE
UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
Study online at https://quizlet.com/_flwssf
1. Which type of genetic disease Sex-Linked recessive. Since males only
affects males more frequently have one X and one Y, if the affected chro-
than females? mosome has the illness, it will be expressed.
Sex-linked recessive
Autosomal recessive
Autosomal dominant
Sex-linked dominant
2. In which two conditions Intellectual disability and fetal miscarriage.
are chromosomal abnormali- Chromosome abnormalities are the leading
ties the leading known cause? known cause of intellectual disability and
fetal miscarriage.
Intellectual disability
Respiratory disorders
Fetal miscarriage
Cardiovascular disease
Mental illness
Check My Answer
3. What are three examples of Chorionic villus sampling (CVS), amniocen-
prenatal diagnostic studies? tesis, and preimplantation genetic testing
Drug-sensitivity testing (PGT) are examples of prenatal diagnos-
Chorionic villus sampling tic studies and are performed in vitro. CVS
(CVS) is a form of genetic testing that provides
Microscopy of cervical mu- genetic information found in utero and is
cosa usually performed between weeks 11 and
Preimplantation genetic test- 14 of pregnancy. An amniocentesis is a form
ing (PGT) of genetic testing that evaluates amniotic
Amniocentesis fluid and is usually performed during the
second trimester, between weeks 15 and
20 of pregnancy. PGT is performed on the
embryo prior to implantation.
4. Which genetic disorder is Cri du chat syndrome (translated as "cry of
characterized by the presence the cat") is caused by a DNA deletion. This
of a zygote having one chro- term describes the cry often heard from a
mosome with a normal com- baby affected by the syndrome. Cri du chat
, WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM 2024-2025 COMPLE
UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
Study online at https://quizlet.com/_flwssf
plement of genes and one syndrome can present as a microcephalic,
chromosome with a missing low birth-weight baby with a piercing cry.
gene?
Klinefelter syndrome
Down syndrome
Cri du chat syndrome
Turner syndrome
5. How can an X-linked recessive The disease can be transmitted through fe-
disease skip generations? male carriers.
Mothers cannot pass X-linked Since females have two copies of the X
genes to their sons. chromosome, the mother may provide an
Females are hemizygous for unaffected X to a daughter or son. Further-
the X chromosome. more, a daughter may not show signs of the
The disease can be transmit- disease because she has the other X (the
ted through female carriers. only X the father can give to a female) to
These diseases need only one cancel it out.
copy of the gene in females.
6. Which type of risk is referred Relative risk is a ratio of probability, not an
to as the ratio of the disease actual occurrence of disease.
rate among the entire popula-
tion to the disease rate in an
unexposed population?
Relative
Attributable
Contingency
Causal
7. What are the empirical risks Many factors from lifestyle to genetics affect
for most multifactorial dis- multifactorial diseases. Observation and
eases based on? evaluation of each case individually pro-
vides the most thorough and accurate as-
Direct observation sessment.
Chromosomal testing
Relative risks
Liability thresholds
UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
Study online at https://quizlet.com/_flwssf
1. Which type of genetic disease Sex-Linked recessive. Since males only
affects males more frequently have one X and one Y, if the affected chro-
than females? mosome has the illness, it will be expressed.
Sex-linked recessive
Autosomal recessive
Autosomal dominant
Sex-linked dominant
2. In which two conditions Intellectual disability and fetal miscarriage.
are chromosomal abnormali- Chromosome abnormalities are the leading
ties the leading known cause? known cause of intellectual disability and
fetal miscarriage.
Intellectual disability
Respiratory disorders
Fetal miscarriage
Cardiovascular disease
Mental illness
Check My Answer
3. What are three examples of Chorionic villus sampling (CVS), amniocen-
prenatal diagnostic studies? tesis, and preimplantation genetic testing
Drug-sensitivity testing (PGT) are examples of prenatal diagnos-
Chorionic villus sampling tic studies and are performed in vitro. CVS
(CVS) is a form of genetic testing that provides
Microscopy of cervical mu- genetic information found in utero and is
cosa usually performed between weeks 11 and
Preimplantation genetic test- 14 of pregnancy. An amniocentesis is a form
ing (PGT) of genetic testing that evaluates amniotic
Amniocentesis fluid and is usually performed during the
second trimester, between weeks 15 and
20 of pregnancy. PGT is performed on the
embryo prior to implantation.
4. Which genetic disorder is Cri du chat syndrome (translated as "cry of
characterized by the presence the cat") is caused by a DNA deletion. This
of a zygote having one chro- term describes the cry often heard from a
mosome with a normal com- baby affected by the syndrome. Cri du chat
, WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM 2024-2025 COMPLE
UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
Study online at https://quizlet.com/_flwssf
plement of genes and one syndrome can present as a microcephalic,
chromosome with a missing low birth-weight baby with a piercing cry.
gene?
Klinefelter syndrome
Down syndrome
Cri du chat syndrome
Turner syndrome
5. How can an X-linked recessive The disease can be transmitted through fe-
disease skip generations? male carriers.
Mothers cannot pass X-linked Since females have two copies of the X
genes to their sons. chromosome, the mother may provide an
Females are hemizygous for unaffected X to a daughter or son. Further-
the X chromosome. more, a daughter may not show signs of the
The disease can be transmit- disease because she has the other X (the
ted through female carriers. only X the father can give to a female) to
These diseases need only one cancel it out.
copy of the gene in females.
6. Which type of risk is referred Relative risk is a ratio of probability, not an
to as the ratio of the disease actual occurrence of disease.
rate among the entire popula-
tion to the disease rate in an
unexposed population?
Relative
Attributable
Contingency
Causal
7. What are the empirical risks Many factors from lifestyle to genetics affect
for most multifactorial dis- multifactorial diseases. Observation and
eases based on? evaluation of each case individually pro-
vides the most thorough and accurate as-
Direct observation sessment.
Chromosomal testing
Relative risks
Liability thresholds
