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Multiple Choice Quiz
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1
The process by which a male or female set of chromosomes is halved is called
A)homologous.
B)crossing over.
C)mitosis.
D)meiosis.
2
Genes exert their influence by coding for the production of
A)chromosomes.
B)autosomes.
C)proteins.
D)alleles.
3
The process of crossing over occurs during
A)mitosis.
B)meiosis.
C)fertilization.
D)conception.
4
A person's outward appearance is the same as the person's genetic makeup only if the genetic makeup for that trait is
A)codominant.
B)homozygous.
C)heterozygous.
D)recessive.
5
"Trisomy 21" is a term for
A)fragile X syndrome.
B)Down syndrome.
C)Turner syndrome.
D)Klinefelter's syndrome.
6
Which of the following chromosome abnormalities affects only females?
A)Turner syndrome
B)Klinefelter's syndrome
C)fragile X syndrome
D)Down syndrome
7
An alphafetoprotein assay is a
A)type of ultrasound.
B)type of DNA sample.
C)routine prenatal blood test that screens for several conditions.
D)routine prenatal blood test for Huntington disease.
8
The effects of PKU can be minimized through
A)medication.
B)physical therapy.
C)corrective surgery.
D)diet.
9
Baby Jessica is highly responsive to others and smiles often. She probably receives more positive stimulation from others than does baby Anne, who is relatively unresponsive. These babies demonstrate
A)an evocative genetic-environmental interaction.
B)a passive genetic-environmental interaction.
C)an active genetic-environmental interaction.
D)niche-picking.
10
The primary concern for behavior geneticists is
A)identifying single genes that cause changes in behavior.
B)understanding chromosomal errors that contribute to developmental deviations.
C)identifying the genetic material involved in transmitting personality characteristics.
D)calculating hereditability factors.
11
On average, dizygotic twins share what percentage of genes?
A)100%
B)50%
C)25%
D)less than 5%
12
According to some researchers, which of the following is TRUE of monozygotic twins?
A)They often select similar environments.
B)They developed from two different eggs fertilized by two different sperm.
C)On average, they have half their genes in common.
D)They have a greater non-shared environment than non-twins.
13
Which of the following aspectics of cognitive behavior is LEAST influenced by genetic factors?
A)creativity
B)verbal ability
C)spatial abilities
D)memory
14
According to Thomas and Chess, the largest number of infants fit into which temperament category?
A)slow-to-warm-up
B)difficult
C)easy
D)fearful
15
Babies from which culture are considered by researchers to be easier to console and faster to adapt to external changes?
A)Chinese American
B)European American
C)Irish
D)Mexican American





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