Biology: The Dynamics of Life, California Edition

Chapter 12: Patterns of Heredity and Human Genetics

Patterns of Heredity and Human Genetics

1.
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Examine the graph in Figure 12-4, which illustrates the frequency in types of skin pigmentation in humans. Another human trait that would show a similar inheritance pattern and frequency of distribution is _____.
A)number of fingers and toes
B)blood type
C)incidence of cystic fibrosis
D)height
2.
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What type of inheritance pattern does the trait represented by the shaded symbols in Figure 12-1 illustrate?
A)multiple alleles
B)codominance
C)incomplete dominance
D)sex-linked
3.
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For the trait being followed in the pedigree, individuals II-1 and II-4 in Figure 12-1 can be classified as _____.
A)homozygous dominant
B)homozygous recessive
C)mutants
D)carriers
4.
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Based on Figure 12-3, what do you know about individual III-1's mother?
A)She had the trait.
B)She was a carrier.
C)She was homozygous recessive.
D)She was homozygous dominant.
5.
Which of the bar graphs shown below represents what the phenotypic frequencies might be for polygenic inheritance?
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181859/Ch12_0_b.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (2.0K)</a>
B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181859/Ch12_0_c.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>
C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181859/Ch12_0_d.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>
D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181859/Ch12_0_e.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (2.0K)</a>
6.
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According to Figure 12-5, what is the chance that individual A will be afflicted with Huntington's?
A)100%
B)75%
C)25%
D)50%
7.
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What is the probable mode of inheritance for the normal trait in Figure 12-3?
A)sex linkage
B)multiple alleles
C)polygenic
D)simple dominant
8.
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What phenotype is depicted in Figure 12-8?
A)AB
B)O
C)B
D)A
9.
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Refer to Figure 12-1. If individual III-2 marries a person with the same genotype as individual I-1, what is the chance that one of their children will be afflicted with hemophilia?
A)50%
B)75%
C)0%
D)25%
10.
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In Figure 12-7, the trait shown is _____.
A)X-linked
B)not sex-linked
C)Y-linked
D)trisomy
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