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WGU D115 UNIT 2|2023 LATEST UPDATE|GUARANTEED SUCCESS
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Which type of genetic disease affects males more frequently than females? Sex-linked recessive Autosomal recessive Autosomal dominant Sex-linked dominant Sex-Linked recessive. Since males only have one X and one Y, if the affected chromosome has the illness, it will be expressed. In w...

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  • May 27, 2023
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WGU D115 UNIT 2
Which type of genetic disease affects males more frequently than females?



Sex-linked recessive

Autosomal recessive

Autosomal dominant

Sex-linked dominant - correct answerSex-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 answerIntellectual 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 answerChorionic 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 answerCri 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 answerThe 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 answerRelative 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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