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WGU D115 UNIT 2 Exam 46 Questions with Verified Answers,100% CORRECT
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WGU D115 UNIT 2 Exam 46 Questions with Verified Answers
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WGU D115 UNIT 2 Exam 46 Questions with VerifiedAnswers
Which type of genetic disease affects males more frequently than females?
Sex-linked recessive
Autosomal recessive
Autosomal dominant
Sex-linked dominant - CORRECT ANSWER Sex-Linked recessive. Since males only
have one X and one Y, if the affected chromosome has the illness, it will be
expressed.
In which two conditions are chromosomal abnormalities the leading known
cause?
Intellectual disability
Respiratory disorders
Fetal miscarriage
Cardiovascular disease
Mental illness
Check My Answer - CORRECT ANSWER Intellectual disability and fetal miscarriage.
Chromosome abnormalities are the leading known cause of intellectual disability
and fetal miscarriage.
What are three examples of prenatal diagnostic studies?
Drug-sensitivity testing
Chorionic villus sampling (CVS)
Microscopy of cervical mucosa
Preimplantation genetic testing (PGT)
Amniocentesis - CORRECT ANSWER Chorionic villus sampling (CVS),
amniocentesis, and preimplantation genetic testing (PGT) are examples of
prenatal diagnostic studies and are performed in vitro. CVS is a form of genetic
testing that provides genetic information found in utero and is usually performed
between weeks 11 and 14 of pregnancy. An amniocentesis is a form of genetic
, testing that evaluates amniotic 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.
Which genetic disorder is characterized by the presence of a zygote having one
chromosome with a normal complement of genes and one chromosome with a
missing gene?
Klinefelter syndrome
Down syndrome
Cri du chat syndrome
Turner syndrome - CORRECT ANSWER Cri du chat syndrome (translated as "cry of
the cat") is caused by a DNA deletion. This term describes the cry often heard
from a baby affected by the syndrome. Cri du chat syndrome can present as a
microcephalic, low birth-weight baby with a piercing cry.
How can an X-linked recessive disease skip generations?
Mothers cannot pass X-linked genes to their sons.
Females are hemizygous for the X chromosome.
The disease can be transmitted through female carriers.
These diseases need only one copy of the gene in females. - CORRECT ANSWER
The disease can be transmitted through female carriers.
Since females have two copies of the X chromosome, the mother may provide an
unaffected X to a daughter or son. Furthermore, a daughter may not show signs
of the disease because she has the other X (the only X the father can give to a
female) to cancel it out.
Which type of risk is referred to as the ratio of the disease rate among the entire
population to the disease rate in an unexposed population?
Relative
Attributable
Contingency
Causal - CORRECT ANSWER Relative risk is a ratio of probability, not an actual
occurrence of disease.
What are the empirical risks for most multifactorial diseases based on?
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