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During which period of development is the unborn baby MOST at risk of developing a structural defect due to the effects of a teratogen?


A) At conception
B) During the germinal period
C) During the embryonic period
D) During the fetal period

E) A) and B)
F) A) and C)

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Which of the following is NOT accurate regarding studies of the placental barrier?


A) Cigarette smoke weakens fetal membranes.
B) Cortisol, a stress hormone, can cross from mother to her developing baby.
C) Most bacteria can pass from mother to her developing baby.
D) Ethanol from mother's alcohol use can pass to her developing baby.

E) A) and B)
F) None of the above

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A group of tissues in which small blood vessels from the mother and offspring intertwine but do not connect is the:


A) amnion.
B) placenta.
C) embryo.
D) umbilical cord.

E) B) and D)
F) A) and D)

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Using the example of a child who inherited the genes to be very tall, explain how a genotype may be expressed in a variety of phenotypes.

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Even though the genetic code is there to...

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The _____ provides an environment that is temperature- and humidity-controlled, as well as shockproof.


A) placental wall
B) pericardial fluid
C) umbilical cord
D) amniotic fluid

E) B) and D)
F) A) and D)

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Mary and Jim are expecting a child, and prenatal diagnostic procedures have confirmed that the fetus has _____, a neural tube disorder that causes brain and spine abnormalities. Their physician has explained that this gene-linked abnormality could be treated with corrective surgery at birth, orthopedic devices, and physical or medical therapy.


A) spina bifida
B) Tay-Sachs disease
C) PKU
D) Huntington's disease

E) All of the above
F) A) and D)

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_____ is caused by the presence of an extra copy of chromosome 21.


A) Down syndrome
B) Hemophilia
C) Huntington's disease
D) Sickle-cell anemia

E) A) and B)
F) A) and D)

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Juan-Carlos was born full term but was underweight for his gestational age. He would be considered:


A) preterm.
B) premature.
C) normal.
D) small for date.

E) A) and C)
F) B) and C)

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Sylvia is almost nine months pregnant and very close to her delivery date. The doctors have found that she has an active case of genital herpes. Which of the following is the best course of action to prevent Sylvia's baby from contracting the disease?


A) Perform a cesarean section
B) Terminate the pregnancy
C) Deliver the baby through the birth canal
D) Give the baby blood transfusions

E) All of the above
F) A) and B)

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Sherry is expecting her second child. Her daughter is very curious about the developing embryo. When walking outside on a cold day, her daughter asks, "Is the baby cold too?" Sherry explains that the _____ provides temperature control for the baby.


A) umbilical cord
B) amniotic fluid
C) placenta
D) ectoderm

E) A) and B)
F) A) and C)

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Which of the following women has the highest probability of giving birth to a child with Down syndrome?


A) Sarah, a 21-year-old Asian woman
B) Jane, a 41-year-old Euro-American woman
C) Ella, a 27-year-old African-American woman
D) Destiny, a 38-year-old African-American woman

E) All of the above
F) C) and D)

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The process of _____ involves fertilizing eggs in a laboratory dish and transferring those eggs to a woman's uterus.


A) neural migration
B) fetal MRI
C) chorionic villus sampling
D) in vitro fertilization

E) All of the above
F) B) and C)

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_____, the units of hereditary information, are short segments of DNA. Genes


A) They direct cells to reproduce themselves and to assemble proteins.
B) Chromosomes
C) RNA
D) Ribosomes

E) All of the above
F) A) and C)

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All body parts eventually develop from the layers of the embryo, with the ______ producing the internal parts and the _______ producing the surface parts.


A) endoderm; mesoderm
B) mesoderm; endoderm
C) endoderm; ectoderm
D) ectoderm; endoderm

E) None of the above
F) B) and D)

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Which of the following was NOT a finding in the study of sleep deprivation and genetic expression described in the textbook?


A) It increased inflammation.
B) It increased cortisol production.
C) It impaired protein functioning.
D) It prompted the expression of stress-related genes.

E) None of the above
F) B) and C)

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Which of the following statements about the effects of marijuana exposure on offspring is true?


A) Research has concluded that marijuana use by pregnant women is associated with motoric deficits in their offspring.
B) Research has indicated that mothers who use marijuana while pregnant have a higher risk of having a child who develops depression by age 10.
C) Research has shown that mothers who use marijuana while pregnant risk their offspring using marijuana by age 14.
D) Research has concluded that controlled doses of marijuana are associated with increased memory in the developing offspring.

E) All of the above
F) A) and C)

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_____ is the way an individual's genotype is expressed in observable and measurable characteristics.


A) RNA
B) DNA
C) Phenotype
D) Stereotype

E) B) and C)
F) All of the above

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Which of the following maternal diseases carries the risk of delivering very large infants, weighing 10 pounds or more?


A) Genital herpes
B) AIDS
C) Gestational diabetes
D) Syphilis

E) A) and C)
F) B) and C)

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Which of the following is a small molecule that would be able to pass through the placental wall?


A) Red blood cells
B) Carbon dioxide
C) Hormones
D) Maternal wastes

E) None of the above
F) B) and D)

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Which is NOT true of the genome-wide association method?


A) Its success led to the start of the Human Genome Project.
B) It involves machines that scan cells for variations in cells.
C) It is used to identify genetic variations linked to particular diseases.
D) It requires studying DNA from those with and without a particular disease.

E) C) and D)
F) None of the above

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